Kingston Frontenacs, Peterborough Petes have 2 line brawls in last minute of OHL playoff game (VIDEO)

Once wasn't enough for two OHL rivals to let some latent hostility out on Tuesday.

With 30 seconds left in the first Ontario Hockey League playoff game in Peterborough in four seasons, projected high NHL first-rounder Sam Bennett scored an empty-net goal that dashed the Petes' remaining hope of winning and assured the Kingston Frontenacs of taking a 3-0 series lead. Petes centre Michael Clarke (not shown on camera) cross-checked Kingston's Henri Ikonen after the puck went in the net and pretty much everyone on the ice, save Ikonen since he was the odd man out in a 6-on-5 situation, proceeded to grab a grappling partner.

Once order was restored, both coaches put out their tougher players. Following a Kingston offside, some pushing and shoving escalated into everyone on the ice fighting again, and the ex-NHLers behind the benches, Petes coach Jody Hull and the Fronts' Todd Gill, traded accusations about who started it.

Kingston forward Slater Doggett declining to resume his fight with Peterborough's Cameron Lizotte and skating off the ice unescorted by a linesman, now there's a definition of restraint.

From Mike Davies:

“It's embarrassing,” Gill said. “I understand no one likes to lose but when you send five guys out to fight I guess the toughest part for me is that as a coach I have never done that. I look at their two coaches and they never did that, as far as fighting. Their careers, they weren't fighters and to ask kids to go out and do that baffles me.”

Petes coach Jody Hull had a different take.

“I didn't send out anyone to fight,” Hull said. “They sent Verbeek, who is tough, Mack Lemmon, who played one shift a game, Doggett is a tough kid. I get last change. If he puts those guys out there I'm not putting [skilled younger players] Eric Cornel on the ice and Anthony Stefano. Those things happen. Their three guys jumped our one guy and things evolved from it.”

Gill called for a lengthy suspension to Clarke.

“He could have broke the kid's back,” Gill said. “That's the type of stuff I was talking about before. If you want to do something, drop your gloves and fight a guy, don't try to break his back. I hope they throw the book at him.”

“I just think it was more frustration on our players' part,” Hull said. “It's part of the game and happens at every level.” (Peterborough Examiner)

Clarke, who's in his 19-year-old season, got a five-minute match penalty that all but assures he will miss Game 4 of the series, and probably a few more games as well. Kingston's Doggett and Mack Lemmon, along with Lizotte and Petes captain Connor Boland, were all thrown out for engaging in fights after an altercation had already begun. Typically, an OHL team can pay a fine during the playoffs rather than have a player serve a suspension.

The moment Kingston and Peterborough were paired for the playoffs, one knew it was going to be an emotional series between the two East Division counterparts. The Petes are making their first playoff appearance since 2010, while Kingston's also eager to experience its first playoff run in a decade and a half. The puck luck, not to mention the number of power-play chances, has favoured Kingston. It's not hard to understand why frustration boiled over for Clarke.

Neate Sager is a writer for Yahoo! Canada Sports. Follow him on Twitter @neatebuzzthenet (video: TV Cogeco Ontario).