Far as plowing snow, I was plowing in an F-700 flatbed with a salt spreader on the back with gravel in it for ballast.
I started up this street that went uphill fairly steep. I was about to the crest of the hill when the truck lost traction and I went into a more or less uncontrolled slide backwards down the hill. This was at night on top of it.
At the bottom of the street I was sliding backwards down was a T intersection with a house directly across from the street I was on. I had visions of ending up with my truck in their living room as I went. Luckily the truck came to a stop in their front yard a ways away from the house, and also, by luck, I didn't crap my drawers lol.