c/r all-in with the nut straight oop, silly or standard?

[Fnord]

Table is weak/tight/passive with a couple soft spots (BB is one)
BB is a big fat loose/passive fish.
No read on CO yet


PokerStars No-Limit Hold'em, $0.50 BB (8 handed) FTR converter on zerodivide.cx

UTG ($37.20)
UTG+1 ($47.15)
MP1 ($37.90)
MP2 ($132.90)
CO ($52.40)
Button ($16)
Fnord ($102.20)
BB ($32.65)

Preflop: Fnord is SB with 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
UTG calls $0.50, <font color="#666666">1 fold</font>, MP1 calls $0.50, <font color="#666666">1 fold</font>, CO calls $0.50, <font color="#666666">1 fold</font>, Fnord completes, BB checks.

Flop: ($2.50) 8[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
Fnord checks, <font color="#CC3333">BB bets $1.5</font>, UTG folds, MP1 folds, CO calls $1.50, Fnord calls $1.50.

Turn: ($7) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
Fnord checks, <font color="#CC3333">BB bets $3</font>, <font color="#CC3333">CO raises to $6</font>, <font color="#CC3333">Fnord raises to $100.2 (all-in)</font>