What to do with this river shove from villain...

Cerberus

PokerStars Hand #75860519533: Tournament #515406948, $4.00+$0.40 USD Hold'em No Limit - Level IV (25/50) - 2012/02/19 11:30:16 ET
Table '515406948 64' 8-max Seat #7 is the button
Seat 1: wyder91 (1200 in chips)
Seat 2: tablelovesme (893 in chips)
Seat 3: Stanislav006 (3987 in chips)
Seat 4: McAusland (3630 in chips)
Seat 5: Velliton87 (6660 in chips)
Seat 6: PATRONAT (2895 in chips)
Seat 7: bursali545 (11977 in chips)
Seat 8: knappende (5005 in chips) is sitting out
knappende: posts small blind 25
wyder91: posts big blind 50
*** HOLE CARDS ***
Dealt to McAusland [Jh Qs]
tablelovesme: folds
Stanislav006: folds
McAusland: raises 100 to 150
Velliton87: folds
PATRONAT: calls 150
bursali545: folds
knappende: folds
wyder91: folds
*** FLOP *** [Js 5s 7d]
McAusland: bets 150
PATRONAT: calls 150
*** TURN *** [Js 5s 7d] [6h]
McAusland: bets 250
PATRONAT: calls 250
*** RIVER *** [Js 5s 7d 6h] [Ts]
McAusland: bets 350
PATRONAT: raises 1995 to 2345 and is all-in
McAusland: ... ummm ... uhh ...

No history with villain. I did a quick run on hands he had played at the table. Had only show down one hand that was an A high nothing on the river. From the look of the hand he was simply calling because he didn't believe opp had anything.

Shove seems very strange to me. Either uber bluff or flush. Any thoughts? I should have thought before the river what I would do if he shoved but was not thinking that far in advance.

Vekked

pretty loose open, definitely would just fold QJo pre. I think I would just check the river too, betting is kind of thin and when you bet small like that you induce bluffs, and really there's not many worse hands left now that JT got there, and he probably doesn't play J8/J9 all that much... it's a bit ambitious to think he still calls with a 7 too often. So yea I think it's a pretty clear fold (although I do think you're good some % of the time), but probably not a bet to begin with.

Cerberus

I've been doing better at not playing hands like this (QJ, K10, Q10, KJ) from mp as it is a definite leak of mine. I end up with stupid spots like this where I can't call because there's just so much crushing me.

Checking river next time is a definite good thought, should I end up in this spot again.