Snapping turtles will happily take your finger off, the crabby things. If you hit one with your car, you'll get a flat tire and the turtle will be fine and probably laugh at you. One of those things went nuts on me once, and I'll never forgive them.
Anyway, after I had made the turn around and came back, the turtle was just climbing up onto the median but she still had to navigate the north bound road to get to the pond. So I picked her up and helped her across the street and dropped her into the pond. I say she because I suspect she was returning from the woods from an egg laying journey. I would say she was in the neighborhood of 30 pounds......