There was ice in the back of this pickup truck, and the drips created a puddle in the parking lot. These little sparrows were having a wonderful time splashing about in the water. I have a lot of respect for city sparrows. They survive under very adverse conditions.
It's definitely a towing hitch on a big pickup with boxes of some sort of food in the back. Leaking water from melting ice is my guess. There was a whole flock of these little guys having the best time in the drips. Shot very fast and from a distance to keep from scaring them off. Wasn't sure I could crop it enough to see the birds.