I was at a game against the Colts in the late 80s or early 90s and we all booed Jim Kelly because he stunk up the field the first half. The Colts were a horrible team back then and they were whipping us. Funny thing he came out the second half all fired up, brought the team back, and won the game. He even made a comment after the game - something like "who replaced all the booing fans with cheering fans during halftime". Do you think cheering after a bad play is going to get a player or team fired up? Come on - think about it.