[lil']

I've been playing at less than my best for over a month, so forgive the stupid nature of any questions I may ask over the next few days. But anyway...

I thought my image was pretty tight. What do you do when an unknown check-raises you on the flop?

Party Poker 10/20 Hold'em (6 max, 4 handed)

Preflop: lil' is Button with 9[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img].
UTG folds, lil' raises, SB calls, BB calls.

Flop: (6 SB) 2[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="blue">(3 players) </font>
SB checks, BB checks, lil' bets, SB raises, BB folds, lil'...