from Ron Kantowski of the Las Vegas Review-Journal,

Throwing an octopus onto the ice in Detroit or booing NHL Commissioner Gary Bettman at first sight notwithstanding, the handshake at center ice after a playoff series remains one of its most endearing.

“I just think it’s a respect thing,” Golden Knights alternate captain Deryk Engelland said after going through the receiving line for the second time on the winning side after his team eliminated the San Jose Sharks in six games. “You go in a seven-game series, the rivalries that are created, the chippiness and all that (stuff).

“At the end of the day, it’s great for one team and not so good for the other. But in that respect, it goes a long way in showing how respectful the game is.”

No one knows for sure how and when the handshake line started, only that it has been a hockey tradition for as long as Zambonis have been roaming the ice.

The cool thing about it is there really is no protocol.

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Even Dino Ciccarelli on Claude Lemieux is mentioned in the article, watch Ciccarelli's comment below.