Clarification on icing rules can't come soon enough for Don Cherry.

Icing is one of Grapes' favourite topics of discussion on Coach's Corner on Hockey Night in Canada, and on Friday night he sounded off once again on the confusion surrounding just what is icing and what is not.

"Nobody knows what's going on," he said, pointing to an icing that was called against the Boston Bruins early in Game 4 of the Eastern Conference final against the Pittsburgh Penguins.

On the play, the puck was shot into Pittsburgh's end and was played by Penguins defenceman Douglas Murray. He was checked into the boards by Boston winger Milan Lucic, who was given a minor penalty for unsportsmanlike conduct

It seemed that neither Lucic nor Murray had been aware the play was being whistled down for icing. Murray wasn't hurt by the check, but Cherry is concerned that a serious incident will someday arise from such a play.

"They've got to get it straightened out before somebody gets killed in this game," he said. "Can't they see what's going to happen?"

The NHL's Competition Committee recommended this week that the league adopt hybrid icing. It will be an experiment during the next pre-season, at which time the board of governors will decide whether or not it will be used in the regular season.

Crosby needs more protection

Cherry also said Pittsburgh Penguins captain Sidney Crosby needs more room on the ice in order to play up to his usual high standard, and he hasn't had the room because he hasn't had the protection.

Grapes pointed out that Boston's David Krejci has excelled and is leading the playoff scoring race because he enjoys the same security Crosby lacks. He then showed examples of the Pittsburgh sniper being abused at will by the Bruins.

"I played tough hockey, but I don't go for that stuff," Cherry said, reflecting on the days when he coached the Bruins to two Stanley Cup finals in the 1970s.

"Maybe if I had done it to [Guy] Lafleur and [Marcel] Dionne and [Mike] Bossy and guys like that, we might have won [the Cup]. But I don't know. I just don't go for that."

Cherry was full of praise for Boston's Gregory Campbell, who famously suffered a broken leg during Wednesday's Game 3, yet remained on the ice to finish his shift, then skated off under his own power.

"That's the spirit of the Bruins," Grapes said.