What is this guy misplaying?

[PokerBob]

100/200

Villain has not done anything exceptional that I have seen in the few hours that I have played with him. He is running good and wearing sunglasses. He does not play too many hands preflop, and has no other glaring weaknesses that I have been able to diagnose at this point. I am blowing at this point, and likely stuck 8K in the game. I have no idea if he is aware of this.

1 guy limps, I limp J[img]/images/graemlins/heart.gif[/img]T[img]/images/graemlins/heart.gif[/img] in MP, villain limps the button, blinds come along. I think it was 5 ways to the flop. Maybe 6. Whatever.

flop: K[img]/images/graemlins/club.gif[/img]J[img]/images/graemlins/diamond.gif[/img]T[img]/images/graemlins/spade.gif[/img]
checks to me and I bet, button calls and maybe a limper calls.

As the turn is being dealt, villain says "ace". I have no idea what this means.

turn: 5[img]/images/graemlins/club.gif[/img]

I bet, villain now raises (if anyone was in the pot behind me, they are gone now), I do what and why and what on earth does this guy have that makes any sense at all?