$25/50, I screw up turn then 2.5x bet on river..(50bb stacks warning)

[ski]

Reads and stuff:

Poppers seems to play like a Nit OOP, but aggro in position. Not too much history though. Not sure how he views me but I can't remember ever catching him bluffing vs me. Limited history though.

Poker Stars - No Limit Hold'em Cash Game - $25/$50 Blinds - 9 Players - (LegoPoker Hand History Converter)

nemuii: $2,443.00
poopers: $6,245.00
luggy: $950.00
sweetluvin7: $5,092.00
turkishred: $4,847.00
Hero: $2,447.00
royke: $500.00
ktrieu: $4,875.00
regista8: $2,825.00

Preflop: Hero is dealt A[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/club.gif[/img] (9 Players)
3 folds, <font color="red">Hero raises to $150.00</font>, 4 folds, poopers calls $100.00

Flop: ($325) J[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] (2 Players)
poopers checks, <font color="red">Hero bets $250.00</font>, poopers calls $250.00

Turn: ($825) T[img]/images/graemlins/spade.gif[/img] (2 Players)
poopers checks, Hero checks

River: ($825) 4[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">poopers bets all-in for $5,845.00</font>, Hero folds

Pot Size: $6,670.00 ($3 Rake)