Sounds like me. I know I was sort of a lone bike. I asked the instructor when he came to make sure I didn't take anyone out. I had on red leathers and a white helmet. I stood there and talked with the corner worker for a minute but I don't remember much of what we talked about, other than him asking if I was ok, and I told him my vision was weird out of my eye. I guess he called for medical at that point. My windscreen on my bike was crushed into a bunch of pieces, but the bodywork looks ok for the most part. Maybe that was the crunching you heard? I dunno. Thanks for telling me what you saw. I'm trying to make this a learning experience, you know?