The Philadelphia Eagles ' fans booed a drunken man standing in for the real performer dressed as Santa Claus in a halftime show .
Fans of the Philadelphia Eagles American football team are notorious for heckling ; among the most infamous incidents were booing a drunken man standing in for the real performer dressed as Santa Claus in a halftime show in 1968 , and cheering at the career-ending injury of antagonist Michael Irvin in 1999 .
Heckler