Crossword puzzle clue "person kicking himself maybe"

Person kicking himself, maybe

"___ should keep himself to himself": "Treasure Island"

"Man will do many things to get himself loved, he will do all things to get himself ___": Mark Twain

Besides Olivier, he's the only person to direct himself to a Best Actor Oscar

1996 nominee parodied as referring to himself in third-person

Person who may be beside himself?

"The Simpsons" character who often refers to himself in the third person

Muppet who refers to himself in the third person