yea i should of called but logically can you think of a single hand that would normally see a player lead out on that river after flat calling the turn ? Sure the occasional float but not to many 2nl players do that. also 3-1 is not so great if you feel that another player likely rivered a better flush given their action on the river. Are you saying you have never folded a rivered flush? Anyway the dude with a set had a 71 percent equity edge on the turn