As full-out as it can get

You've see what a rabbit looks like running full-out. Those hind legs are amazing.

Have you seen how a spooked rabbit runs in deep soft snow? Instead of getting solid propulsion out of those legs, it looks more like it is swimming along the snow. There's a wild thrash at the rear, and then surfing for a fraction of a second, and then thrashing again. If I'd been so inclined, I probably could have caught it.