Buddy of mine in college wiped out on a rocky hill. He was fine but when we looked at his chest protector there was a 4 inch long gouge almost all the way through the plastic on the upper chest form a sharp rock. Can only imagine what that would have done had he not had it on.
I apparently broke three ribs in a decent crash that also broke my collarbone. The hospital didnt tell me even though I complained about it hurting. They are healed not but not correctly and now I have periodic pains and muscle problems on that side.