This is something that every skier should see.  It’s amazing to watch as they end up going off the jump slightly non-simulaneously, which results in a domino effect as you watch each skier invert an instant after the guy to the left of him.  It’s beautiful and impressive.  You’ve really gotta trust the skiers around you to be willing to go for this and they’ve gotta be good to pull it off.
from the horses mouth:
30 Freestyle athletes from quebec performed a linked simultaneous backflip at end of season events at Mont Saint-Sauveur.Â
bomb.com
very freakin’ cool!