I usually don't wear one when I'm doing light trail riding. My last DH race I landed on my head/shoulder at a very good speed and my full face helmet probably saved me from a serious injury, got up and felt fine.
so when i went biking by the bow river i saw a drop so i hit that a couple of times and thought it was to easy so i tried a x up off it and i hit my head a a big tree branch (but only got a bit of my head rest of it was my helmet)so i fell in to the river but luckly my leg was still on dirt so scrambled out of the water and luckly my phone was int done yet so i phone my dad and he says o shit you need shtiches so two sets of stiches in two months. but luckly i was
yah i ride without helmet wen i go to movies, skool friends house and stuff i only wear helmet if i go djing sometimes i dont wear my helmet if i go skate park only wear it if i go to track.