3
I went to use a payphone and suddenly this guy crammed himself inside with me, took off his clothes, put on some blue outfit with a red cape and flew right out the door.

Well not really flew, just ran really fast since he had a meth pipe he kept hitting while he got naked in there.
2
Maybe we could get a job cleaning their teeth, like those little ones do with crocodiles. Though, secretly we'll hope we will soon evolve into dinosaurs ourselves, so we can have birds clean OUR teeth instead.
3
Say that you need to use the bathroom for a bit, then play with your plastic spiders for a while.

After you flush and wash your hands, open up that jar of real spiders you also brought with you, and dump them all out.

This is my favorite prank! I don't know why it includes glue.
3

Chatted with her for a few minutes, but she never responded to anything that I said. Then, she picked up a twig with her beak and flew up into a tree.

5