Ice yard killer

The concrete yard was covered with a thin layer of ice. This is a perfectly flat surface with a slight slope. There's nothing to hold on to. Falling on concrete is a dubious pleasure, especially when a person hits his head.

I didn't fall. But I didn’t remove the ice either. What if someone comes into the yard when I’m not at home. Then the ice will help the guard cat Dora :)

The reason for the appearance of ice is a sharp change in temperature. First it snowed and it was cold. Then it got warmer. The snow began to melt. But suddenly it got cold again. The water froze before it could soak into the ground.

And this is a video of the snow from the day before yesterday that melted and froze today.
Video: "One minute of snowfall"
https://rumble.com/v40axgg-one-minute-of-snowfall.html