[RoosterRedux]

That story is a nice example of a lengthy paraprosdokian. Here's a good short one by Groucho Marx:

"I've had a perfectly wonderful evening...but this wasn't it."

Here's another nice one (unattributed):

Behind every successful man is a woman. Behind the fall of a successful man is usually another woman.

[Erasmus]

A couple of shorties from the late Tom McCahill:

“Honesty is the best policy—when there’s no other choice.”

“A penny saved is a waste of time.”