i got a bike one,
riding my DMR down a recently plowed hill, and simple as, i hit a massive lump, and flew at least 4 metres through the air, (which is along way when your in the air) i was lucky to land almost feet first, bike was fine, just caked in mud and usual stuff like seat bent, handlebars un-straightened etc.
another time, i was running through a privately owned woods with m8s (friends wood) airsofting , when i tried to vault a log and fell onto my chest, winding me, that wasnt the bad thing. The other team thought i was prone, and still fighting, and kept shooting me for 10 mins until they realized i was in massive pain i must of got hit 100 times in the head from 15 metres...
Ruthless Potato- ive also had something like that, when my hydraulic brake sprang a miraculous leak, how i have no idea, cause it really shouldnt have, anyway, it de-pressurises the brake making it useless, on a downhill track, and a front brake without a back on is useless, unless you like flying over the front, (especially with Hydraulic brakes cause its hard to get a smooth stopping speed with the front brake) so there werent many options, apart from do the track without slowing down at all, it was the biggest thrill ever, because i couldnt slow down in any way, so i hurtled down a 1:3 gradient track at over 30 mph. Luckily by applying the slightest amount of force to the brake possible i could slow down very slowly. If i had of had no brakes at all like you, i would of got properly hurt i reckon, as i had at least half way to go before the end of the track,