I encountered this weasel while approaching a cattle grate crossing, and it really put on a show for me while it bounded between the slats, dropping in one area and popping up somewhere else. If you've ever seen river otters playing in a zoo, this it totally what it looked like. This guy was really playful, and seemed only to move in fast-motion -- that is, until it became curious about my car. It cautiously crept towards the vehicle (which I was standing a bit away from) and then would bolt back to the safety of the grate before creeping a little bit closer the next time. Eventually it was brave enough to approach, and was sure to inspect all of the tires and the tail pipe.
Checking out the area behind the tires:
Soon enough though, it realized that a car isn't all that interesting when compared to a cattle grate, and it bounded back to its playground.