I once rolled halfway down the landing of a jump. Hip was killing me like crazy. Managed to get to the edge, looked up and realized the people on the drop couldn't be seen. I swear that guy hated me, but it really hurt, I managed to get to the end of the hill with lots of falling over. I got out of there way, but they couldn't see me. Which is something you also have to look out for.
My friend who was on the drop in as well bashed me about it for ages. Not being able to stand up doesn't seem to be a valid answer.