A/N: I spent the last few days watching Doctor Who with my sisters. I watched that episode and this idea popped into my head. I don't own the Avengers or Doctor Who. Reviews are appreciated and I am always in need of suggestions for more pranks.

Day 7

It was Clint's idea to watch Doctor Who. They had all seen at least the first episode, so they decided to watch the ninth episode "The Empty Child". The team settled onto the couch, Natasha lying on Clint, Pepper with her head on Tony's chest, and the others in various armchairs. Tony played the episode and halfway through the episode Thor shouted "What type of being is that child?"

Bruce shushed Thor. "He's a mutant of some sort, I think."

Tony glanced at Natasha. Her face was a blank mask that Tony took to mean that she was slightly scared. On the TV screen, a small hand pushed through the mail slot on the door. "Please let me in, Mummy. Please let me in."

Natasha was frowning and pressed slightly closer to Clint, a fact that did not escape Tony. He turned back to the TV, a slight smirk on his face. "Please let me in, Mummy. I'm scared of the bombs."

As the Doctor said he would open the door, Clint gestured angrily at the screen. "Don't let him in! He'll kill you!"

Natasha chuckled and Clint quieted.

After the episode finished, Tony insisted that they save the next episode for another night, despite the fact that the episode had ended on a cliffhanger. Nobody was happy, but they agreed nonetheless. When Natasha took Seth for one last walk before she went to bed, Tony snuck into her room and hid a small stereo behind some pillows on her couch. When Tony felt like it, he would press a button, and the stereo would turn on and say things like: "Are you my mummy?", "Please let me in, Mummy.", or Tony's personal favorite, "Mummy, Mummy, Mummy, Mummy."

Tony was out of Natasha's room before she got back and waited excitedly until she went to bed. When she was in bed and looked to be on the verge of sleep, Tony pressed the button. Through the (newly installed) security cameras, Tony heard. "Are you my mummy?"

Tony turned it off and after a moment turned it back on. "Mummy, Mummy, Mummy, Mummy."

Tony watched as Natasha lifted her arm and extended it toward the stereo. There was a gunshot and the stereo was blown to bits. She muttered "Idiot" and put her gun back under her pillow, leaving Tony to sit in shock and silence until he fell asleep as well.

When Tony woke up, he felt something on his head. Assuming it was his blanket, he tried to push it away. He froze when he felt what it was. A gas mask. Tony jumped out of his bed and ran to a mirror. He was wearing a gas mask. He tried to pull it off his face, but it was stuck. It was like it was glued to his face. Tony looked at the back of his hand and jumped when he saw the scar.

He turned on the faucet in the sink in the bathroom and stuck his hand under it. Was this some kind of sick joke? Tony scrubbed at the scar, hoping it was just make-up. The scar stayed present, it didn't even fade. Tony let out a cry of alarm and Pepper ran into the bathroom. She took one look at him and shrieked before running from the room.

When Tony finally left the bathroom, he sent Steve running to get his shield and Clint notching an arrow. Natasha took one look and burst out laughing. Everyone stared at her in shock. She smirked and took a spray bottle from her pocket. She sprayed the edges of the mask and Tony yanked it off. He still felt like he was going to pass out. She sprayed his hand and the scar ran off too. Tony looked in the mirror. On his forehead the word "really?" was printed.

Tony huffed in anger and stomped from the room.