facing massive overbet on flop with second pair

[vandyhawk]

Full Tilt Poker
No Limit Holdem Tournament
Blinds: t400/t800 (Ante: t100)
Converter

Stack sizes:
UTG: t5812
UTG+1: t8520
MP1: t7460
MP2: t18915
MP3: t47339
Hero: t29040
Button: t3800
Villain: t21928
BB: t22075

Pre-flop: (9 players) Hero is CO with 8[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img]
5 folds, <font color="#cc0000">Hero raises to t2250</font>, Button folds, Villain calls t1850, BB folds.

Flop: 4[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img] (t6200, 2 players)
<font color="#cc0000">Villain is all-in t19578</font>, Hero ???

This 3x pot sized push was rather odd. The villain in this case was a pretty aggressive player, but not totally crazy, and I had a hard time putting him on a hand here. I have second pair, and it's 2/3 of my stack, but can you put him on a hand that beats us?