Walking the dog without walking

Just up the hill from where we live is a decent sized park which is an off-leash area for dogs. Quite often as we're driving by the park, we'll notice a particular dog owning couple walking their dog in the park.

What's so remarkable about that is that they're not actually with the dog. They're riding alongside the park... on the road....... in their van. It's the funniest thing, really. The van's cruising alongside the park at a slow pace and the dog is walking beside the van, or occasionally running off into the depths of the park, only to run back to the van. As if to say, "Come on guys! Get out and come run with me!"