[waxhax0rs]

To be honest I think he is bluffing less than 35% of the time. This line looks like a monster (or at least your opponent thinks it's a monster, ie any overpair). The problem is I've rarely actually seen what my opponents have when they take this line because I usually don't have something to call with. It's you say your opponent is tight...do tight players typically bluff allin on the river? That's what I'd ask.