Mostly Trivial Fun Stuff:

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, sometimes 

producing an anticlimax.

For this reason, it is extremely popular among comedians and satirists.

Examples:

Behind every successful man is his woman. Behind the fall of a

successful man is usually another woman.

A clear conscience is usually the sign of a bad memory.

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

I asked God for a bike, but I know God doesn’t work that way. 

So I stole a bike and asked for forgiveness.

To be sure of hitting the target, shoot first 

and call whatever you hit the target.