40/80 at the Taj vs. Maniac

[highlife]

Played in an incredible game friday night, Maniac was playing EVERY hand preflop, raising 60% of the time. He was also a pretty poor postflop player, he would sometimes change gears but often at awkward and inappropriate times.

I'm in seat 3, seat 5 is the maniac, seat 1 is a calling station who raises light preflop but settles down alot post and seat 2 is a fairly tight player, however he has shown me his hand often if I'm not involved and I've seen him make some strange plays.

I'm in MP with black Q's.

Seat 1 (station) opens raises UTG, Seat 2 (old man) 3-bets, I think for five seconds and cap, Maniac calls 4 cold, blinds fold, station and old man call. Four to the flop for 17.5 SBs.

FLOP:
A J rag (rainbow)

Station checks, old man bets....

whats my plan?