According to Wikipedia, a paraprosdokian is a figure of speech in which the latter part of a sentence or phrase is surprising or unexpected in a way that causes the reader or listener to reframe or reinterpret the first part.  It is frequently used for humorous or dramatic effect, and sometimes provides an anticlimax.

Take a look at some of these and you can see what I mean….

– Change is inevitable except from a vending machine.

– A bus is a vehicle that runs twice as fast when you are after it as when you are in it.

– You are never too old to learn something stupid.

– Some cause happiness wherever they go.  Others whenever they go.

– I used to be indecisive  and now I’m not sure.

– Hospitality is making your guests feel like they’re at home even if you wish they were.

– The voices in my head may not be real; but, the have some good ideas!

– Whenever I fill out an application, in the part that says “if an emergency, notify:”         I put DOCTOR.”

– Always borrow money from a pessimist.  He won’t expect it back.

– You don’t need a parachute to skydive.  You only need a parachute to skydive twice.

– I didn’t say it was your fault, I said I was blaming you.

– Why does someone believe you when you say there are 4 billion stars but check when you say the paint is wet?

– Dolphins are so smart that within a few weeks of captivity, they can train people to stand on the very edge of the pool and throw them fish.

– To be sure of hitting the target, shoot first and call whatever you hit the target.