In reply to Ridge:
I can remember telling my venture scouts to keep low and if you think you are going over try to spread yourself out and try to slide. I never really knew why until I saw someone go bouncing down a slope, fortunately he survived but he was in a very bad way with multiple fractures, internal bleeding and stuff. Unfortunately sheep are basically round and can't spreadeagle themselves to try and slide. Bit of a design flaw really.