Shelley spent a lot of time around border collies as a pup, so she likes to herd when she's in the mood. It's very funny to see a Lab drop into that "stalking" mode with the belly down and giving whatever she's herding the evil eye.
My daughters 9 month old lab, who had never been around water, was fun to watch too...He just barreled right off the bat, no hesitation at all:)