Rivalries in the NHL often result in off-ice rivalries as well, especially if they are between original six NHL franchises, and well, that was well demonstrated just the other day between these two diehard hockey fans.
A Montreal Canadiens and Boston Bruins fan managed to show up at the same spot at the same time, which resulted in a heated altercation. It seems as if this could very well be a planned altercation, but it's interesting to say the least..