I'm baffled, early MTT

[TheChad]

Villain is a younger guy (earlyish 30's) and doesn't seem a donk, but this is the first time I've played with him. No real reads. I normally assume somewhat TPAish.
I'm in LP with about 7k and villain covers.
It was a small (4-tables) $40 buyin tourney.

blinds are at 25/50 level 1.
PF: hero is dealt A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/spade.gif[/img], villain limps UTG, 2 MP's call, I bump to 350, only villain calls.

Flop [J [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/diamond.gif[/img]]: Check, check.

Turn [5 [img]/images/graemlins/spade.gif[/img]]: Check, check.

River [K [img]/images/graemlins/spade.gif[/img]]: Villain leads for 300, I make it 900 after a couple of seconds thought, he insta-shoves.

??? Does anyone get away from this?