I don't own a thing. Not associated in any way with SG1 show or the like.

Not my best and I don't feel it's completely in character either. Especially Sam. But the idea would not shut up in my head until I wrote it down. More will come eventually but I've got like 3 or 4 stories I'm thinking about simultaniously, so it may not be right away.

Anyway, on with the story.

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Stretching on his bed, Jack slowly opened his eyes.

'That's not my ceiling' he thought, wearing a confused expression.

Slowly eying the darkened room, he realized he wasn't in his room at all.

'Wait a minute. I've seen this room before. Crap! What the hell am I doing in Carter's room?!'

His eyes immediately went to the other side of the bed. Empty. Breathe, O'Neill.

'Okay. What happened yesterday?'

He remembered coming home from work...alone...to his own house. He had a beer and some leftover Chinese, watched tv, and went to bed. In his bed. He remembered very clearly that it was his bed. So how in the hell did he end up here?

Throwing the covers off, Jack walked into her bathroom. Lifting the toilet seat, he looked down and proceeded to scream loudly, jump back, and hit the wall.

A noise came out of his mouth that sounded very much like a squeak. But, my god, he had boobs! If there was ever a time when it would be okay for a man to squeak, it would be waking up to find you have boobs. Not prepared to face what else was most likely missing, Jack hesitantly walked towards the mirror.

When he got there, he realized he had squeezed his eyes shut. After slowly convincingly himself that if he opened his eyes, he would wake up and find this was all a bad dream, Jack did open his eyes. To find Samantha Carter staring back at him.

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Sam jolted awake with a gasp, not quite remembering the dream that had evidently shocked her.

She was laying in the fetal position with her arms between her knees and her head almost hanging off the bed. Speaking of knees, they really hurt this morning.

Phone. A phone was ringing. Ah. That's what woke her up. Reaching for the phone on her nightstand, Sam instead knocked over a lamp. I don't have a lamp there. Seeing a light shining from the floor, she realized it was the screen from the phone and picked it up.

"Hello."

Could she sound like more of a man this morning?

Nothing. Not a sound.

"Hello!"

She cleared her throat. Maybe she was coming down with something.

"Carter?" came the very hesitant reply.

She knew her voice was horse, but who else would be answering the phone at her house?

"Yes?"

Sam was getting a little impatient with whoever this woman was now.

"Have you looked in the mirror this morning?"

What kind of a stupid question was that?

"Who is this?"

There was another pause.

"How about you go look in the mirror first."

Grumbling, Sam hopped out of bed. Ow. Nix the hopping this morning. What did I do to my knees?

It was then she realized that she was not in her own home. In less than a second she also realized whose bedroom she was in. Oh god! That was why this woman was so hesitant. She was in her CO's house. Why the hell was she in her CO's house at...0600!?! And wait a second, what woman would be calling Colonel O'Neill first thing in the morning? And one that would know her no less?

"Carter? You still there?"

"How do you know who I am? Who is this?"

Ick. Her voice was grating this morning. Which was kind of odd because her throat wasn't even sore.

"I take it you haven't looked in the mirror yet?"

Okay. Now she was annoyed. Stomping off to the bathroom, Sam flicked on the light and dropped the phone unceremoniously on the floor.

It wasn't until she heard what must have been shouting from the phone that Sam snapped out of her enforced brain coma. There was just no way she saw what she thought she saw. No. Way. After picking up the phone, Sam looked in the mirror again. Nope. Still there.

"Carter, are you okay? Carter? Sam?"

"I...I...I...oh god."

"Yeah."

"I...just...but...sir?"

"Yep."

"Oh god."

"Uh-huh."

"Sir, are you gonna say anything else?"

"Nope."

Ugh. He so obviously was past the initial freak-out stage. Unfortunately, she wasn't.

"I can't do this. I went to bed a woman, and I woke up a man. You! This isn't funny. This isn't even possible. We didn't do anything. I ate Chinese and I went to bed."

"Carter."

"Our last mission wasn't even eventful. I took some soil samples and Daniel looked at some rocks. Oh god, I'm even talking like you. What if we're turning into eachother?"

"Carter."

"There was no Machello device. There were no devices period. There is absolutely no scientific reason this could have happened."

"Carter!"

"Sir?"

"First of all, breathe."

Sam took a deep breath.

"Breathing?"

"Yes, sir."

"Good. Now, go get dressed and we'll meet at the SGC where you will figure this out and everything will be peachy again."

"Sir, I don't even know where to begin to..."

"Ah. Ah. You will figure this out, Carter."

"Yes, sir."

"Meet you there in 30."

Starting to feel a little cheeky, Sam said, "Yes, sir...or should I say mam?"

"Carter! Not funny."