When I almost got to Big Meadow on Skyline Drive (Blue Ridge Parkway in Virginia--all day climbing), I stopped and helped a box turtle across. I was only going about 4 mph at that point, so it was easy to convince myself to take a little helpful break.

My mom tried to move a big snapper with a snowshovel once and it whipped around and snapped the snowshovel and cracked it (plastic, not metal). Gotta be careful with those guys.