Am I a maniac?

[mntndrew]

Live 6/12.

MP: jovial college kid, plays pretty tight but very passively.
CO: cold called my UTG raise with T9s and bet all the way down after flopping trips.
BN: Projects LAG image, but tightens up considerably postflop. Raised 32s UTG. Possibly maniac preflop, decent post.
BB: Has less than 4.5 BB in his stack and has been at the table for 10 minutes.
Hero: Has played three hands in half an hour, all pretty passively and mucking before showdown.

MP limps, CO limps, BN raises, Hero has A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/diamond.gif[/img] in the SB and 3-bets. BB tanks for about 15 seconds and caps (< 2.5 BB left). MP folds.

CO is upset and asks why BN raised, says he's going to get lucky and calls. BN laughs but doesn't seem too happy about his hand either and calls. I fold. Just kidding. Four to the flop.

Flop [16+SB]: 6 [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/spade.gif[/img] 5 [img]/images/graemlins/heart.gif[/img]
I bet, BB calls, CO calls, BN calls, says one card can help him.

Turn [10+BB]: K [img]/images/graemlins/club.gif[/img]
I bet, BB calls, CO folds, BN folds.

River [12+BB]: K [img]/images/graemlins/spade.gif[/img]
I bet... (BB has 5/6 of a bet left)