When they demoed the airbag at my local mountain (Crystal), It was at the base area and you just hiked to the predetermined drop-in point. They also said no straight backflips, but this one kid tried to speed check heelside at the lip, slipped out and slammed the back of his head into the lip two times in a row. He wasnt allowed to hit the airbag anymore lol.
There were a few people that came really close to smoking their heads when they started flipping too soon. Up in the quad cities my friend saw a skiier try to do a switch front flip on the bag and went right to his face. Started flipping about 5ft too early.