I'm allowed to limp in with 37os (Okay, it's Sklansky class 9, what's your point?) and I flop a straight to a rainbow board. Naturally, nobody bets, and I know that if I bet, nobody will stay.
Turn - Blank. No bets, and I check again.
River - King! I manage to get one taker on a medium sized bet.
It's a drag when there isn't a possible second-best hand, isn't it?