A man with long brown hair ran away giggling, hiding behind a door with a window.
"Tegan? Nyssa? Adric? Where are you?" a man with a stick of celery on his lapel called as he approached a door. He opened it to look inside, but found nothing, so he closed it.
"This isn't funny, Adric, where are you?!" the man said. He sighed and sat down in a folding chair. He spotted a peanut can on the table next to him, and picked it up. It had a note taped to it.
For the Doctor
-Anonymous
Five shrugged, not suspecting a thing, and opened the can. Out popped a fake snake, and he jumped, throwing the can across the room. The shock caused him to topple over backwards in the chair, and a chorus of loud laughter erupted from behind the door the other man was hiding behind. The door swung open to reveal Eight, Adric, Nyssa, and Tegan all having a laugh.
"He got you good, Doctor," Tegan said.
"Ha ha yes, very funny," Five said, standing up from the floor and dusting himself off.
"Well, I must be off. Nice seeing you three," Eight said with a smile as he left.
The Third Doctor was working in his laboratory at UNIT. He turned to go get something and found himself face-to-face with a spider. The man yelped and whacked at the spider, sending it across the room. When the spider didn't move to get up, he retrieved it, discovering it was a plastic toy.
"This isn't funny!" Three said, and laughter erupted from behind a machine in the corner; the source, a man in a leather jacket, stepped out from behind it.
"I don't care, I had a laugh," Nine said, taking the toy spider back from Three and leaving.
The Tenth Doctor was laying on the applegrass on New Earth with Rose Tyler. The two got up, obviously going towards the hospital, when Ten tripped over something. HE looked to see what it was, and kicked it into the air with a small yelp when he saw what it looked like. Rose started laughing.
"Doctor it's a fake leg," she said, holding the object up to the Doctor.
"Alright which one of you did this?!" Ten shouted into the surrounding field. Out came a man in a bowtie and a fez.
"Totally not sorry, mate," Eleven said with a huge grin on his face as he took the fake leg back and ran away.
The First Doctor walked down the street with his companions Barbara, Ian, and Susan, obviously heading somewhere, when he heard something squelch under his foot. He lifted it to see he had stepped in what appeared to be vomit.
"This is absolutely uncalled for," One said. Light laughter sounded from behind a building, and a man wearing a thin bowtie and a Beatles' haircut stepped out.
"Fake vomit," Two said, and then bolted before anyone could come after him.
The Sixth Doctor walked out of his TARDIS and into a building. He felt something land on him and he spun around, trying to get it off. He got it off and saw a fake worm had been dropped on him. Laughter came out of a room to Six's left, and Six peered in to see Seven.
"Have a good laugh?" Six said, mildly angry.
"Yes, I did. Good day," Seven said with a smile before leaving.
Four, having experience with the pranks pulled in his previous three lives, remained wary of pranks during his entire fourth life. He realized that he was meant to pull a prank on his future self, and snuck into the war room where Eleven would visit Winston Churchill. Four snickered, and then threw fake spiders onto Eleven, who jumped and spun, trying to get the things off. Four and Amy laughed at the older Doctor.
"Very funny, Doctor," Eleven said once they were all off, spying where Four was hiding.
"It was a laugh," Four said with a toothy grin.
Hope this was enjoyable, I don't normally write this kind of thing.