mysterious lights

so last night i was sitting on my sofa and i saw this light.

it is not unusual for there to be light there, because, as you can see, there are parking places pointing in the area of the light.

but it looked weird, because none of the cars has their lights on.

so i looked around to see if maybe a car father across the road was shining its lights up there, and no. the light appears to be coming from behind that pine tree. and something is moving in that shadow. i never do see what person is out there, but i see them in the shadow.

the plausible explanation is that they are shoveling snow off of the pond for skating, but it does not seems to me that it has been consistently cold enough for that to be safe to do.

it's a mystery.