I did a little judo when I was young (only 3 years IIRC, from 6 to 9) and it saved my life many many times, falling from horses, bikes, motorbikes, anything really, at reasonable speeds and with almost no protection.
When falling from something that's moving, you will continue to move when you hit the ground; to limit hurting yourself you need to roll and not skid. The way to do that is to put yourself into a ball, and to do it by instinct (as of course you don't have time to think about it).
When falling from something that's moving, you will continue to move when you hit the ground; to limit hurting yourself you need to roll and not skid. The way to do that is to put yourself into a ball, and to do it by instinct (as of course you don't have time to think about it).