You're dead against A2, bigger pockets or a set. You're vastly ahead of A9, a smaller PP or a total steal. Against two diamond overs, which is what I would want to have making this move, you're in a coin flip:
<font class="small">Code:</font><hr /><pre>
http://twodimes.net/h/?z=1425163
pokenum -h th tc - ad jd -- 2d 9d 2c
Holdem Hi: 990 enumerated boards containing 2c 9d 2d
cards win %win lose %lose tie %tie EV
Tc Th 508 51.31 482 48.69 0 0.00 0.513
Ad Jd 482 48.69 508 51.31 0 0.00 0.487</pre><hr />Villain may be tricky but he cannot be stupid. To risk his stack against the one player who can knock him out there has to be a reason. I fold here. I don't even know if I call KNOWING it's a coin flip to be honest since I can't help but feel there will be much better edges to come with my still-sizable stack.