A great joke to pull on someone is to say "Hey, I have a great knock knock joke, but you have to start." They'll respond "Okay, knock knock." Then you can say "Who's there?" and wait for their dumbfounded expression and the hilarious awkward silence to ensue, amirite?
I did this to SO many people. If they answered, I'd keep going and say, "I don't get it." or "That wasn't very funny." IT WAS HILARIOUS!!!
Whenever I hear that I think of Looking for Alaska. Such an amazing book.
My math teacher pulled that joke on one girl in my class two different times. It was hilarious because she always fell for it!