In reply to mutt:
One thing you all probably don't realise, but maybe it will only affects some people anyway?... , is how much wear takes place in your knees each time you fall and land on your feet.
As you get older even from the age of midtwenties onwards for me, perhaps even younger for others, you begin to notice that jumping off things, even with something like well cushioned running shoes, makes your knees hurt.
In my late 40's now, even landing on thick bouldering matts at a wall from 10ft up i wil feel this.
I'm not sure if the damage was done early on, when forced to go on cross country runs at school, in shoes called plimsoles, with soles as thin as rock shoes. I liked running and cross country so i took it up again in late teens, but couldn't afford decent running shoes, so i added to the damage, until i realised i had to give up because of the pain.
From my 20's i realised i could only go on a run about once a fortnight.
At work i was often jumping on and off stuff too, and again the pain became apparent, but it took some real focus to become mindful enough to step or climb down from everything, to try to prevent the damage.
Bouldering back then we didn't use crash pads.
They must be well worth investing in, not just to prevent serious injury, but also to protect your cartiledge in knees and other joints.
Now i try to avoid jumping off anything, and down climb when possible.
Rock over's can be a cause for concern too.
Knees need looking after.
Post edited at 08:01