I'm throwing in a PFR with these little pairs from time to time, as a mixup and (theoretically) to improve the chances of getting paid when the set hits.

Noble Poker, so no good HH, but here we go:
me:

$50NL full ring
I'm about MP3. MP1 limps. I go to 4BB. Big blind and limper call

Flop:
:Ts:

BB check, MP1 check, I bet $2 into $6. BB calls, MP1 folds

Turn
here's the interesting bit: BB only has $4 left. Heshe doesn't seem to have connected, but I've seen some tricky plays at this table. I check behind.

River
BB checks.

Having checked the turn, I think the right play here is to check behind again. Opp won't call off w/o a pair, and pretty much any pair beats me. But I feel like the turn check-behind was bad.