A circus is holding auditions and an eighty-five year old man shows up.
“What do you do?” asks the ringmaster.
“I bend over backwards, “says the man, “and pick up a handkerchief off the floor with my teeth. “
“Wow, “says the ringmaster, impressed that this elderly man is agile enough to do this. “Then what do you do?” he asks.
“Then I bend over again, “says the man, “and pick up my teeth. “
This joke is included in the Black Book of Jokes. You can order it from here.