I believe the 1970-71 playoffs that Ken Dryden single handidly beat the vastly superior Bruins in the quarter finals. He completely stole the series. Maybe the best goaltending display in NHL history. Maybe only surpassed by Tretiaks performances against Team Canada and various NHL teams when they toured. Anyway, this was the Bruins were all that when they had Orr, Esposito, Hodge, Cheevers and so on.