ouch. yep if you have a full face wear it is my motto.
years ago i was at delamere forest on the table tops, were easy but not easy to get from 3rd and clear the 4th. was a really hot summers day so took my full face of as i was taking it easy. needless to say i missed the landing ramp on the 3rd jump and landed in the middle of the copmression fron twheel first and face planed the 4th jump.
these jumps had been there for years, was hard as concrete and nocked me straight out for a good 15 secs!!
spent the night in hospital with concousion