The Philadelphia Eagles ' fans booed a performer dressed as Santa Claus in a halftime show and they also boo the Eagles themselves if they do not perform up to expectations .
Fans of the Philadelphia Eagles American football team are notorious for heckling ; among the most infamous incidents were booing a performer dressed as Santa Claus in a halftime show in 1968 , and cheering at the career-ending injury of opposing player Michael Irvin in 1999 , as well as routinely booing the Eagles themselves if they do not perform up to expectations .
Heckler