PARAPROSDOKIANS are figures of speech in which the latter part of a sentence is unexpected.
Some examples:

1. Where there's a will, I want to be in it.

2. Since light travels faster than sound, some people appear bright until you hear them speak.

3. If I agreed with you, we'd both be wrong.

4. War does not determine who is right - only who is left.

5 Knowledge is knowing a tomato is a fruit. Wisdom is not putting it in a fruit salad.

6. They begin the evening news with '