You could ask this guy who went through last Saturday.
http://www.cbc.ca/news/canada/north/plow-plunges-through-lake-dog-derby-1.3503132
Then there's this fella from early March up on Great Bear Lake.
My landlord flew to Deline today to work on recovery of this truck.
http://www.cbc.ca/news/canada/north/truck-plunges-deline-ice-road-1.3477869