Dr. Lane, sounds like you went down on a motorcycle. Here in CT, we don't have helmet laws. Many, many years ago when I first started riding, sometimes I wore one, sometimes not. One time I left the house without it. Couple miles later, "something" yanked on my mind to turn around and go get the helmet, so I did. About an hour later, a car cut me off making a turn across my path with no signal. My brakes locked up on some sand and I went down, sliding almost under another car. I had an orange Bell full face and the slide of over fifty feet left an orange streak along the pavement. The front of the helmet was eaten away by the slide, but I was not injured( on my face or head ).
From then on, ALWAYS full face and NEVER without a helmet, no matter how hot it is..
I currently own an ARAI Signet-GT, which is Snell & DOT approved. Cost almost $500.00, and worth every penny. Question: Why wouldn't this helmet be allowed on a track in a car?
If the helmet is quality and fits properly, there's no way an air bag is going to cause it to injure your face. A helmet fits well if you can shake your head violently from side to side and up and down, and the helmet doesn't budge. It's going to be a little hard to put on and take off, but once on it will conform to your head, but snugly. A good helmet will feel a bit too tight for a little while until the liner starts to form around your particular noggin', that's why it's important to wear one for a while when shopping. Trying one on somewhere and then buying mail order is not necessarily a good idea, because even helmets from the same manufacturer can vary in size even though labeled the same. Domestic helmets tend to run large, while imports tend to run small.
HTH,Keith