"Wait Fifty Years" joke

Q: What do you get when you cross an elephant with an ant?
A: A dead ant.

Q: How do you get an elephant on top of an oak tree?
A: Stand him on an acorn and wait fifty years.
Q: What if you don't want to wait fifty years?
A: Parachute him from an airplane.

Q: How do you make a dead elephant float?
A: Well, you take 10 dead elephants, 10 tons of chocolate ice-cream, 5 tons of bananas,.....

Q: What do you get if you cross an elephant with a whale?
A: A submarine with a built-in snorkel.

Q: How do you know if there is an elephant under the bed?
A: Your nose is touching the ceiling.