Don't move, I've got you covered.
or
Nearly unanswerable, since the one who tries to change it usually drops it, and the others call for a planning session.
or
The barman says "I'll serve you, but don't start anything"
or
The dentist is taking me out tonight.
or
A porcupine with split ends
or
Anything you like, he can't hear you.
or
It held up a pair of pants.
or