A thundering crunch preceded several moments of eerie silence at the Air Canada Centre Wednesday night. 

The crowd was quiet as Toronto Maple Leafs blue-liner Paul Ranger was being attended to by medical personnel, while he lay motionless on the ice before being taken off on a stretcher.

Ranger had just been levelled into the boards by Tampa Bay Lightning forward Alex Killorn on a dangerous hit from behind late in the first period.

Ranger's head appeared to be driven directly into the boards by Killorn on the play. The 24-year-old native of Halifax got five minutes and a game misconduct for his actions. 

The Leafs tweeted the blue-liner was in stable condition and was being evaluated at a hospital.

Click above to watch the play unfold. What do you think? Should Killorn be suspended or was it a clean hit? Let us know in the comments section below.