Bigtime WTF Spot 300bb deep nut trips

[MYNAMEIZGREG]

Villain here is deerchaser21. He is really, really strange. Today he got his stack from running good. He plays around 50/25 but he is really tough, in all honesty. He plays strangly, for example checking behind in a 3bet pot on the flop with KK on a a TT9 board, with a fd, but then potting Q7 turn/river when BDFD hits and when potting it with KK 2 streets becomes really thin but I'm pretty sure he doesn't know that. In my opinion here the river spade doesn't matter because I have a good read that his turn play cannot be a draw. I had a hand with him where he potted a draw and did not fire when he missed (in fact I've never seen a missed draw bluff from him) the next street after (the spot was THE SPOT to do it if he ever was gonna).

He took about one second to PSR the flop, thought for about 3 seconds on the turn, and INSTANTLY potted the river. His aggression levels are .83 pre, 1.02 flop, 2.5 turn, 2.11 river, overall 1.04.

What's your play, and does your play change on a 6o river?

Ultimate Bet - No Limit Hold'em Cash Game - $10/$25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $7,918.50
Hero (BB): $7,525.25
UTG: $2,751.00
MP: $3,104.00
CO: $5,943.50
BTN: $472.50

Preflop: Hero is dealt A[img]/images/graemlins/spade.gif[/img] 7 (6 Players)
4 folds, SB calls $15.00, <font color="red">Hero raises to $75.00</font>, SB calls $50.00

Flop: ($150) 7[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/heart.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $150.00</font>, <font color="red">SB raises to $600.00</font>, Hero calls $450.00

Turn: ($1350) 2 (2 Players)
<font color="red">SB bets $1,350.00</font>, Hero calls $1,350.00

River: ($4050) 6[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $4,050.00</font>,