Note to hockey anatomists,
There really is no good vessel to have slashed open in your neck. As Pam pointed out, in a partial tear of the carotid (or any large artery) the fact that they have such thick muscular walls is helpful in holding the vessel together and allow potential repair. Vein walls are very flimsy and so trying to repair a torn vein is like trying to sew two pieces of Kleenex together. The guy is extremely lucky/smart to have held pressure right away and get straight to the ice rather than simply lying on the ice (like what would have happened if he had also been knocked out). He could have exsanguinated in a matter of minutes.
Beep BLOOD! beep!