I thought about it a bit and I think that was the worst one: a trip from Edmonton to The Battlefords in November quite a few years ago. In the middle of a snowstorm, looots of snow and very high winds. It got really worse at a place where there was no way to stop; the safest was still to continue at extremely reduced speed (speed limit 110kmh/70mh, actual speed 30kmh/19mh). No more lanes, just a huge whiteout, almost impossible to see the limit of the road; but obviously some dumbasses were passing, at high speed, the 95% reasonable people driving quietly on the best part of the road.
Cars EVERYWHERE in the central 'ditch' (that was actually full of snow from previous snowstorms, so more like a slightly elevated platform). Most were not bad crashes, more like just slipping to the middle and getting stuck, some bumper damage, not much more. But one of the dumbasses tried to pass just before the column of slow cars was going to pass by a crashed car attended by a tow truck, lost control, rolled over and nearly missed the tow truck. Ghhhaaaa! Made me crazy. Little after that, the storm got less intense and we made it to North Battleford alright. Was an exhausting and stressful experience.
Edit: Ah, and a funny one: When I was in Besançon, France, I once saw a municipal employee removing snow with a 15L/4gallon bucket and a tiny little shovel A whole different world