Because I want to remember this word....

[lizvogel]

Paraprosdokian: 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.

Courtesy of Make Mine Mystery. I'm not sure if my favorite is "You do not need a parachute to skydive. You only need a parachute to skydive more than once." or "To be sure of hitting the target, shoot first and call whatever you hit the target."

;->