"I would think you'd have more urgency, you don't want to go down that road again," Cassidy said. "It's typical. You learn from your experiences, good and bad, in life. That's one … I think you realize you don't want to give one away. It can happen if a team catches fire in the right way or at the right time, but at the end of the day, yeah, I think it does harden you in understanding to have the killer instinct."
The good thing for the Bruins veterans who were part of the collapse against the Flyers in the 2010 Eastern Conference Semifinals is they already have proven they've learned from what happened to them that season.
They went up 3-0 on the Flyers in the 2011 conference semifinals but won Game 4 to finish the sweep en route to winning the Stanley Cup.
"We learned from that, but this is a new team," said Krejci, who didn't play in the final four games of the 2010 series against Philadelphia because of a dislocated right wrist. "We have lots of new guys. We only have four guys who are the same and we are playing a different team too."
But a big part of Boston's leadership core consists of players who have lived through the collapse.
Chara is the captain. Bergeron and Krejci are alternates. Rask is the No. 1 goalie and among the favorites for the Conn Smythe Trophy. Cassidy is their coach, and Krug is one of their best defensemen and the quarterback of their top power play.