bluff-push river for value?

so i decided to post a hand to stop me doing it again, although it felt pretty cool at the time!!!
too much risk for not enough gain - right?

Full Tilt No-Limit Hold'em, $0.50 BB (8 handed) Full-Tilt Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($45.95)
BB ($21.75)
UTG ($49.25)
UTG+1 ($50)
MP1 ($56.10)
MP2 ($25.95)
CO ($27.45)
Hero ($49.25)

Preflop: Hero is Button with 8http://www.flopturnriver.com/phpBB2/...iles/spade.gif, 8http://www.flopturnriver.com/phpBB2/...iles/heart.gif.
3 folds, MP2 raises to $1.5, 1 fold, Hero calls $1.50, 2 folds.

Flop: ($3.75) 7http://www.flopturnriver.com/phpBB2/...iles/heart.gif, Qhttp://www.flopturnriver.com/phpBB2/...miles/club.gif, Thttp://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
MP2 bets $2, Hero calls $2.

Turn: ($7.75) Thttp://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
MP2 checks, Hero bets $4.5, MP2 calls $4.50.

River: ($16.75) 5http://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)
MP2 checks, Hero bets $41.25 (All-In)

I believe u have good sd value

nh

He has $18 behind, so it's almost 1:1 on the pot.

I guess if a weak queen or 99 folds here the majority of the time, it's a decent push, but like XTR said, you have some showdown value. I check behind.