£50 freezeout, table has been quite tight. U pick up

on the button the blinds are 50/100 and the cut of makes it 500 to go you call as does UTG. Your impression of the raiser is that of a maniac and who seems to think Ace high is the nuts. This assumption is not based on this tournament in isolation but based on a number of different hands you have played with the player in question.
Anyway the flop comes down

UTG checks and the c/o now bets 3k into a 1500 pot.
Whats your move? Is it a call, fold or re-raise?