AK again...

My read is that he has entered alot of pots with weak holdings. I dont know if he woudl make this play with them, but most bad players like to bluff here thinking that their opponents have nothing.

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

CO (t690)
Button (t495)
SB (t675)
BB (t955)
UTG (t1040)
UTG+1 (t650)
UTG+2 (t635)
MP1 (t535)
Hero (t755)
MP3 (t1570)

Preflop: Hero is MP2 with A/images/graemlins/heart.gif, K/images/graemlins/heart.gif.
<font color="#666666">3 folds</font>, MP1 calls t30, <font color="#CC3333">Hero raises to t90</font>, <font color="#666666">2 folds</font>, Button calls t90, <font color="#666666">2 folds</font>, MP1 folds.

Flop: (t255) 6/images/graemlins/club.gif, 6/images/graemlins/diamond.gif, 4/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t100</font>, Villian goes all-in, Hero???

[HonestIago15]

Very easy fold.

It was only 300 more to me if this affects your decision. Whcih was the size of the pot.

[ldavidjm]

So you're getting 2:1. Those odds aren't even close to good enough. He's almost certainly got some sort of mid pocket or somewhat rarely A4. If he's a complete donk AQ and AJ are possibilities, but I wouldn't expect to see that sort of hand much if ever. Fold.