Throwing a football indoors is probably something you’d see a boy under 18 doing, but I had to make do with crazy Megan! Fan interference is a rare occurrence (and usually involves a heavy dose of alcohol), that for obvious reasons is not typically broadcast on television. But once I saw someone make the mistake of running out onto the field during a play in an NFL game. There was a collision, and, needless to say, it was not the football player who was carried off the field.
Non-human fan interference!