I just picked up a new GasGas last Friday. I'm learning how to ride a trials bike all over again, used to ride a Bultaco Sherpa-T in the mid 70's so it's been a while! Yesterday I fell and scraped my chin on a high-side fall on my super steep hillside. Fortunately it's decomposed granite sand so it was a soft landing. I will however, be riding rocks soon and since something like 80% of all motorcycle injuries include the chin, I'm now practicing in a motocross helmet. It seems OK, it doesn't block my vision that I can tell, at least at this point in my development and if gives me a little more confidence as well. Do any others use a full face helmet?