This is video of Anaheim Ducks head coach Bruce Boudreau and Colorado Avalanche headman Patrick Roy getting very upset at each other during the season opener for both team on Wednesday night in Denver, Colorado.

Roy, the longtime great NHL goalie, who was making his coaching debut, became upset late in the game when rookie Nathan MacKinnon was given a knee-on-knee hit by Ben Lovejoy of the Ducks.

Later, Roy and Boudreau began shouting at each other. Roy then shoved the glass partition at Boudreau twice, before Corey Perry and Patrick Maroon of the Ducks  shoved it back.

Roy was escorted away, before a bench brawl began.

The Avalanche won, 6-1.

What a way to kick-off the NHL season!