I remember a game at Wakefield where we were 6 points up going into the last couple of minutes. Wakefield scored but missed the conversion, which should have sealed the game for us. Then we gave away a stupid penalty which gave them a chance to kick a penalty to salvage a draw. The Wire fans were absolutely furious. Steve McNamara was their goalkicker, and his kick didn't even make it to the posts. Unfortunately it made it to Dean Busby who tried to catch it but knocked on, a Wakefield player picked it up and scored, sealing the win for Wakefield.
There was another game which didn't involve us, but was in the Salford-Wakefield relegation decider the year Salford went down (and we narrowly survived with Cullen coming in at the end of the year). Salford got a penalty a couple of yards out, I can't remember exactly the scenario but think kicking a penalty would have been good for them at that point in the game. But they had a prop who had come over from the NRL who decided to take a quick tap and dive over the line for the try, but he knocked on in the process of taking the tap. Salford lost and that game was decisive in relegating them.
