Razz-caution or coward?

[jbrennen]

IMO, bet the river in the 2nd hand.

Almost certainly, he did not have a made 7-5 on 6th street. If he had 7-4-3-2 (or better) on 4th street, that's pretty much an automatic bet even against scary two-card boards. (Even if he's reraised, he's not that far behind, and 5s and 6s are very live.)

Maybe he had a made 7-6 on 6th street; checking 7-6-4-3 on 4th street might be reasonable looking at those boards. But if he had that, or a worse hand, you're good unless he rivered the win.

He's almost never going for a check/raise on the river. You check/called 6th street; the chance that you actually bet the river is pretty small.

Bet/call the river after he checks to you. If he does check raise, he's doing it with a smooth 8 or a 7-6 or with total air often enough to call him.