A/N:

I'm taking a short break with my other story since I wrote the next three chapters already and all I need is to proofread them.

This fic has been saved on my computer for weeks and I recently finished it (thank you, spring break).

It'll be a short one, and I'll update this every one or two days depending on the time I get to read it over.

Lastly, this was inspired by the movie, hence the title.

Penny opened her eyes slowly and cautiously, afraid of being blinded by the bright light illuminating the bedroom. Her vision was blurry at first and her head painfully throbbed. It was another one of her bad hangovers, and what she craved was Tylenol.

I've got too much to drink again like always, she mused.

Once her eyes readjusted to the light in the room, Penny sensed that something was... unusual. Across from her bed was supposed to be her vanity, and what was now there was a closet door. Her eyes shifted to the right, finding a bookshelf filled with countless assorted comic books.

She then noticed that the bed she was in was not hers. Penny's candy colored bed sheets were replaced by a dull white one, and all her stuffed animals she usually placed beside her were all gone. Framed on the wall were single comic books, and the nightstand beside her had some kind of DNA model resting on top of it.

"Why am I in Sheldon's room?" Penny asked herself.

Sitting to an upright position, what made Penny more confused was her body. Clothing her body were plaid pajamas and a matching shirt, which she has seen Sheldon wear on numerous occasions. She was even more confused when she lifted her hands, and saw that they were bigger and her fingers were longer.

Her eyes grew wider when she realized that her chest was flat. The blonde hair she loves was not there anymore, and what replaced it was short brown hair. Penny guessed she was having a dream. It was the only logical explanation she could come up with to her waking up in a man's body.

Penny jumped out of bed, and stood on her two feet. She was taller and thinner, it was getting scarier by the minute. There was no mirror in sight and she figured she could use the one in the bathroom to see herself now. She marched to the bedroom door and swung it open. Stepping outside quickly, she bumped into Leonard who held a cup of coffee in his hand and spilled it on the floor.

"Leonard, I didn't see you there." Penny's was surprised to hear her voice deeper and with a familiar Texan drawl.

She watched as Leonard excused himself for a moment to grab a handful of paper towels and returned to wipe the mess away.

"Sorry, I'm in a rush today and you have to find another way to get to work, Sheldon."

Penny froze. Did he just call me Sheldon?

"What?"

Leonard got up from the floor, and Penny had to look down at him. "The university called me in earlier and I need to go now."

"Wait, did you call me Sheldon?" Penny asked.

The shorter man nodded with a bemused expression on his face. "That is your name."

"Leonard, it's me Penny."

Leonard stepped back. "Come again?"

"I woke up in Sheldon's body and I don't know why!"

"Okay, well I think you should get some rest and see if your head clears up with all the craziness after. I gotta go." Leonard ran past Penny, and into his bedroom.

She entered the bathroom and switched the lights on. Penny couldn't speak as she inched towards the mirror, gaping at her reflection at the moment.

Her looks that could kill were gone, and she was now in a certain Dr. Whackadoodle's body.

Penny screamed, but instead of a feminine and high pitched one, she let out the same scream that Sheldon would sound out.

Once she was finished, Penny tried to reassure herself that the dream was still going on and she wasn't going crazy.

She stared at the mirror for awhile, trying to process things. If she was in Sheldon's body, where is Sheldon?

There were many possibilities, but if she had to choose the most likely one, Sheldon was probably in her body at that moment.

Penny shook her head. "Holy crap on a cracker."

Penny found herself standing outside of apartment 4B, where she could have sworn that she was there inside sleeping last night. She raised her hand to knock, but before she could pound on the door, it had already opened.

In front of her was the body that she belonged in. Her eyes followed the hand that gripped her wrist tightly and then pulled her into the apartment. She stumbled, as the Penny-Body shut the door behind her. They looked at each other for a moment, bewildered by what they were seeing.

"Why are you in my body?" Penny said.

Penny-Body, or what she calls it, shrugged her shoulders. "Why are you in mine?"

"I don't know. I woke up this morning in Sheldon's room and found myself here. What the hell is happening and why am I talking to my actual body that I was born with?"

The Penny-Body paused. "You went into my room?"

"What do you mean your room?" Penny asked before she realized that this was really Sheldon she was talking to. "That's you in there Sheldon, right?"

Sheldon nodded slowly. "Penny... why did I wake up with womanly parts?"

"How'd you know that it's me Penny?"

Sheldon moved to the left cushion of the couch, sitting in the spot he chose whenever he visited her apartment. "Because you are the only person I know who would disobey every rule I give you, including entering my bedroom."

Penny suppressed the laughter she had. "You're right. But who's going to answer our questions?"

"Let's think about what had happened the night before," Sheldon suggested before Penny sat down next to him.

"Alright."

Sheldon began telling Penny the events of last night.

"Hurry up, Sheldon. I'm starving," Penny said, urging her taller friend to pick up his pace. Sheldon had invited the blonde to join him to dinner at Szechuan Palace after Leonard, Howard, and Raj decided to go to a club. It was Anything Can Happen Thursday, and Leonard told Sheldon to embrace the chaos around him and do something crazy rather than have pizza.

Sheldon's idea of crazy, however, is eating Chinese on Thursday instead of Friday.

Once they entered the restaurant and were seated at Sheldon's reserved table, they looked through the menu and made a decision of what they wanted. Penny suggested that Sheldon should try a different meal than what he usually orders. Instead of getting his typical General Tso's Chicken, beef with broccoli, shrimp with lobster sauce, and vegetable lo mein dinner, Sheldon ordered a dish of seasoned tofu pork while Penny opted for the shrimp and scallops in mala sauce.

Their food arrived a while later, and Penny decided to engage in banal chit chat with her eccentric neighbor, who was clearly not pleased during the evening.

"Why so down, chump?" Penny asked Sheldon.

Sheldon pushed the plate away from him. "My digestive system has a little problem with this kind of change."

"Come on, finish it up. That's a waste of food and money."

He shook his head. "I am used to General Tso's Chicken, not tofu pork. My stomach is unsettling right now."

Penny rolled her eyes. "Okay, but if you're not going to eat it, I'll take it. It'll be my dinner for tomorrow night."

"Really, Penny? Though I am healthy and disease-free, it is unhygienic to eat someone else's food."

"Does it bother you?"

"Yes."

Penny smirked. "Okay, but I'm still eating it. I'm sure I'm not gonna catch any germs from you."

Sheldon sighed. "You, woman, are infuriating."

"Hey!"

"What?"

"Keep your comments to yourself. I don't want to listen to your insults."

"I'm stating the obvious," Sheldon whispered, but Penny heard him.

She stared at him. "Why are you like this?"

His eyes shot up. "Like what?"

"Like that. For a genius, you sure don't understand how people like me have feelings and don't enjoy being offended every single day."

"I'm not saying those things to offend you, Penny. I was merely pointing it out to you so you are aware of it."

"Okay... but your words hurt."

"Oh, please. You know whose words hurt? The ones from the bullies that tormented me back in Texas. You do not understand what how I felt."

Penny frowned. She knew how much Sheldon was made fun of as a child. "I do. Casting agents make fun of me without even realizing they are. They would tell me I'm not that great or I should just give up on acting. Their words are as bad as what your bullies told you."

Sheldon snorted. "They might be telling the truth."

"WHAT?"

"You need clarification? Penny, you've been in California for two years now. You haven't gotten a single acting job since you've moved here. Maybe giving up acting is the right thing to do and focus on something better," Sheldon revealed.

Penny couldn't believe him. "Well, you haven't proven String Theory! Maybe you should give up on that!"

Sheldon gasped. "That is preposterous! I've dedicated my life to String Theory and I'm confident that I will win my well-deserved Nobel Prize soon after proving its existence."

"That's the point. You've wasted your whole life on some theory that may not even be proven!"

"At least I'm contributing to the scientific world. You're just a college drop-out and a waitress. I'm at high point in my career, while you mooch on others for food and wifi."

Both were throwing more insults at each other, and it got to the point where an older Chinese woman approached the table to tell them to calm down.

"Why should I calm down? He has already belittled me and I'm just returning the favor," Penny said.

Sheldon rolled his eyes. "Belittled you? I was merely pointing out to you the facts."

"Please, we want you to lower it down. You are disturbing the other customers in the restaurant, and if they complain one more time, we will have to kick you out," the woman informed them.

Penny read her name tag. "I'm sorry, Lin. This guy doesn't understand me and I wonder why we're even friends!"

"You do not understand me, either," Sheldon huffed.

Lin stared at the two as they argued once more. She pulled out two fortune cookies out of her pocket and placed it on the table. "Here are your fortune cookies. Again, please calm yourselves down. I do not wish to have you two escorted out."

Penny watched Lin walk away as Sheldon reached over to grab his fortune cookie. "Acting is incomparable to physics, Penny."

"I'm gonna use the restroom," Penny said before taking her purse and cookie.

She headed to the back room where the bathrooms were located. Penny looked behind her to see Sheldon coming towards her direction, apparently to use the bathroom as well. She quickly entered the women's bathroom before Sheldon could reach her.

After washing her hands, Penny held in her hand the fortune cookie. With a sigh, she tore the plastic and cracked the cookie open.

Unknowingly, Sheldon was doing the same thing inside the men's room.

Penny began to read the words on the slip of paper. "A journey soon begins..."

"...its prize reflected in another's eyes," Sheldon spoke his fortune out loud to himself. "When what you see is what you lack..."

"...then selfless love will change you back," Penny finished. "What the hell does this even mean?"

Sheldon turned the paper over and was confused with the fortune he received.

Penny shrugged her shoulders and crumpled the paper in her hands. As she walked to the door, the ground beneath her shook and she held on to the post tightly. She had never experienced an earthquake in California before, so she stood there as she waited it out. Once the vibrations stopped, Penny rushed to the door and saw Sheldon exit the bathroom.

"Sheldon!" She called out, catching his attention. "Are you okay? Did you feel that?"

Sheldon couldn't say anything. He only gave her a nod before they walked back to the tables. Both stared in disbelief to see everyone unaffected by the earthquake that occurred. The room looked exactly like what it did before they left their seats.

She felt a tug on her arm and so she turned around to look at Sheldon.

"Can we leave?" He quietly asked, still surveying the people acting like nothing had happened.

"Yeah, let's go."

Penny listened to his recollection of the night before. "That still doesn't explain how we woke up in different bodies."

Sheldon was stumped on that part. "Switching bodies is complete and utter hokum."

"But it happened."

He sighed. "It seems like it did."

"How do we get back? I certainly do not want to live in this body for the rest of my life."

"Excuse me, that is my body you are talking about. I have scrubbed every centimeter of my skin and sanitized daily to prevent contact with germs. While we resolve our problem, I only ask that you take care of my body as I will do with yours." Sheldon said, but sensed that Penny wouldn't be able to meet his standards.

"Okay, but that means I'll be looking at your body naked," Penny smirked and winked at Sheldon.

Sheldon's cheeks reddened and Penny chuckled. "I do not appreciate the laughter, Penny."

"Oh, come on! You'll be finally seeing a girl naked for once!" Penny joked.

"I am not anticipating to that part."

"Yes, you will. Especially if it's my body." Penny laughed even more seeing Sheldon flustered. "I'm kidding, Moonpie."

"You should be. As I come up with an answer to how we can reverse this effect, we will have to be in each other's shoes for the meantime."

"But I don't want to work at the university," Penny whined.

"And you think in would want to work at The Cheesecake Factory? No, thank you. I'd rather do 10 sit-ups than spend the rest of my day serving platters to patrons, and trust me, sit-ups are challenging for me."

"Why can't we just stay at home?"

"Well, last night we argued about not understanding one another. Let's see if you can be Dr. Sheldon Cooper for a day."

Penny sighed. "Uhh... I'm not looking forward to all the equations and stuff. Hmm.. well if you can survive being me, then I'll believe that physics is more complicated than my life."

Sheldon nodded. "Deal."

Penny stood silently for a minute. "Oh, crap! I forgot! I have this huge audition in three days. Sheldon you have to figure out a way to change this back to the way it used to be before that audition!"

"I'll try, Penny, but I can't make promises. I'm still confused to how this could happen."

They sat on the couch without another word. Sheldon stood up and looked to his body which Penny was current housed in. "Penny. One more thing; no one calls me 'Moonpie' but Meemaw."

Penny stood up and reached down to pat her body's cheek. "Sheldon, until things get fixed, I'm you and you're me. Got it?"

"Fine, but I'll see if I can get used to your vernacular."

Penny smiled. "Whatever floats your boat."