I had one the other day that I consider to be a bad beat. Standard raise to me. I had KQ suited, flop comes KQJ rainbow. he bets, I raise, he reraises. so of course now we go all in. Happy, but not surprised, to see him with KJ only.
Of course river is a jack. I think this qualifies. His opening bet, small, was in no way indicative of a straight. no flush possible and even if he had AK I had him with two pair. so live and learn. only two cards could have helped him better his hand and sure enough one falls.