Fighting has been in hockey since almost the very beginning of the sport. Some fans hate it and think it's holding the NHL back from greater popularity; some fans love it and believe fighting is integral to the game's overall health. The accepted truth is that when your team's star suffers a cheap shot, everybody screams for blood — and once the fight breaks out, nobody goes to get a beer. Brett Harvey's documentary Ice Guardians doesn't argue for either point of view. Instead, it allows current and retired enforcers to explain how they got started on the road to fighting for a living. Some have mixed feelings about their on-ice role. Legendary '70s enforcer Dave "The Hammer" Schultz spoke publicly about regretting the violence after he retired (he's also featured in the documentary). It's a common feeling for the guys who throw the punches — they got into the sport to play hockey, not fight. Ice Guardians screens at 7 p.m. tonight at the Pageant (6161 Delmar Boulevard; www.thepageant.com). Edmonton Oilers great Dave Semenko will be present to discuss his years bodyguarding Wayne Gretzky on the ice, and he'll be joined by the Blues' one-time heavyweight Kelly Chase and his pal, Brett Hull. Tickets are $40. There is also a $100 VIP option that gets you in early for a buffet and special access to the balcony.