If I remember right, airbags are kevlar. I wouldn't worry as much about the bag itself; they only have to hold for a split second. It frustrates the hell out of me when I'm watching a movie and a big, poofy bag inflates and comically gets in the way of the character. When I had to dispose of airbags at the dealership, we'd have the detail shop call a manager or some other desk jockey back to their office. As they'd pass through the shop we'd set off the airbag and they'd jump out of their skin. If you watched the airbag, you'd have an image in your head of what it looked like inflated, but they deflate so quickly that you only have a glimpse. Sounds like a double-barreled shotgun going off, though.