Re: [GreenMachine] Parachuting Helmet Poll
The worst I've done is a long cut down one cheek, just under the eye, from a sharp branch in a bad landing area. An inch higher and that could have been really bad, though. It was just after I took the visor off that (full face) helmet, too.
I have also crushed the chin piece of a factory diver (downwinder in a city). Pretty sure that would have been a lot worse if I hadn't been wearing a full face. As it was, I came away with bruises and a sore jaw, but no serious injury.