It was when Boston's Pastrnak barely fifteen minutes into the second period, in the third quarterfinal against Carolina, put 3-1 that the accident occurred.

The home fans thumped so hard in the plexiglass behind one of the penalty booths that a large disc came loose - and fell over the timer Joe Foley.

Foley was taken out on a stretcher and taken to hospital.

He is reported to have been alert after the incident but his exact condition is unclear.

Boston won 4-2 in front of the home crowd after Taylor Hall scored the team's last goal.

The victory means that Boston reduces the match series against Carolina to 2-1.

Watch the clip of the accident in the player above.