Checking when the scare card hits -- weak tight or smart poker?

[ericlambi]

$100NL PP. Full Ring. Effective stacks $100.

Hero is UTG+1 with A [img]/images/graemlins/diamond.gif[/img]Q [img]/images/graemlins/spade.gif[/img]. Hero raises to $5, is called by MP, Button, SB. Flop:

Q [img]/images/graemlins/spade.gif[/img]J [img]/images/graemlins/spade.gif[/img]5 [img]/images/graemlins/club.gif[/img]

Hero bets $20. MP folds, Button folds, SB calls. Turn:

7 [img]/images/graemlins/spade.gif[/img]

SB checks. Hero checks. River:

3 [img]/images/graemlins/diamond.gif[/img]

SB bets $30 (Pot is $55). Hero thinks for max time and calls.