First of all, yet another whiffed block by Winston is more responsible for this injury than any FAN.
2nd, there is a lot happening. During the running play, Most fans are still watching that play end, listening to the announcer. Bowe is encouraging fans to cheer....Quinn is getting up. Most fans cheering at that point are probably welcoming him to the game, and you hear plenty of clapping when Cassel is walking off of the field.
Winston, Block more, talk less.
"Silence is Golden. Duct Tape is silver"