The 1500 chip straight flush

i was on full tilt poker at a table where the blinds are 500/1000 and everybody folds to me(big blind), except little blind. i look down to find 5 4 of hearts and check. the flop is A,2,3 of hearts and LB checks and i check, then on the turn is a K of clubs. LB checks and i bet the blind and he folds. what a waste.