OUCH

I was making a late move in tonight's tournament, and here is the friggin' hand that killed me:

I call $800 more from the big blind with A6 against a raiser and two other callers.
The flop is Jd 6d 6s.
UTG goes all in with 99.
I've got him covered and I know that I have him beat, assuming a Jack or diamond draw. I raise all in to discourage the big stacks from drawing out on me.
The original raiser folds, but the next guy sees the bet.
Fucker's got JJ.
I finish 20th and pocket a measly $30.