When you clean off the snow from your car to leave the house going to the store, visit someone, etc. Then when returning to the car from that place, having to clean off the car AGAIN (thus cleaning off the car at least twice in the same day).
I cleaned off a ton of snow from my car to go to Walmart. As I got back to my car, there was more snow on the car I had to clean off. DAMMIT, it RESNOWED!!