How did i play this?

On the river it went all in for the remaining chips


Party Poker No-Limit Hold'em, $ BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($49.75)
BB ($36.30)
UTG ($73.05)
UTG+1 ($60)
MP1 ($25.05)
MP2 ($55.35)
MP3 ($50)
CO ($46.32)
Hero ($49.50)

Preflop: Hero is Button with J, J. SB posts a blind of $0.25. MP3 posts a blind of $0.50.
4 folds, MP3 (poster) checks, Hero raises to $2.5, 1 fold, BB calls $2, MP3 calls $2.

Flop: ($7.75) J, 3, 8 (4 players)
BB checks, MP3 bets $3, Hero raises to $9, BB calls $9, MP3 calls $6.

Turn: ($34.75) Q (4 players)
BB checks, MP3 checks, Hero bets $20, MP3 calls $24.80, Hero calls $4.80.

River: ($84.35) A (4 players)

Final Pot: $84.35