When I was in high school my best friend's mom married a guy who had played for the Eagles in the 1960 NFL championship game. They were having a party and he was showing his friends a highlight film of the game. On a key play he throws the key block to spring the RB for a TD (or maybe just a long run, hard to recall perfectly). Someone gleefully pointed out that he was holding on the play.
The host, with a big smile on his face said, "it aint a hold if the ref doesn't call it."