Here's three reasons why fans shouldn't jump the glass at hockey games:
1. Ice is slippery
That's linesman, Ron Asselstine, rocking a fan into the boards as he attempts to get to referee, Bill McCreary. Upset about a non-call, the fan simply wanted to talk to McCreary, but instead got to talk to advertising on the end boards. You may have noticed from watching hockey that linesmen are great skaters. They have great little bursts of speed for retrieving pucks and calling offsides, but they also use their speed to charge from the blueline to hit stupid fans.
3. Rob Ray
Rob Ray's Punch Corsi is off the charts here. We count 15 punches thrown in 5 seconds. It's never a good idea if you do make it on the ice to try and engage players. Most of them are probably much bigger than you and won't take too kindly to you invading their space. In addition to hopping the glass to get on the ice, don't push up against the glass surrounding the penalty box if you're overweight...