Literally first hand at the table. Best line here?
Opp is totally unknown at this point, but i think may have been a FTR'er or 2p2'er considering the chat we had later.
This may be utterly standard btw...

Party Poker No-Limit Hold'em, $1 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($122.95)
MP ($35.93)
Button ($21.45)
SB ($108.25)
Hero ($111.65)

Preflop: Hero is BB with 3, 8.
1 fold, MP calls $1, Button calls $1, SB completes, Hero checks.

Flop: ($4.50) 2, 6, 5 (4 players)
SB checks, Hero bets $3, MP folds, Button folds, SB raises to $8, Hero ???