Funny / Robert Sheckley

• His short story Cordle To Onion To Carrot, describing the reactions the eponymous man gets after he has a revelation about how easily he can switch from being a Woobie to a Jerkass. (And back again..)
• It's tempting to nominate the whole of Mindswap, but if it's necessary to single out just one scene it has to be the ending. Marvin is relieved at having returned to his hometown of Stanhope, NY and reassured at how normal everything seems - even though the reader can see he's actually in an overwhelmingly surreal parody of the place.
• The premise and the main part of "Skulking Permit".
• AAA Ace stories in general, but especially "The Lifeboat Mutiny".