In reply to sbc_10:
Don't know whether this one's real or not but I've seen a hare doing this with my own eyes - it's definitely possible. We were out ski touring in less than good stability when my mate remote-triggered a slab above him. While we were watching him traverse out of the way, a hare which had presumably been having a wee nap curled up under the snow, popped up and ran uphill, leaping from one snow block to the next. It made it out no problem but I doubt it has a good impression of ski tourers now.