Windshield Wipers

When I went outside the other day and hopped into my van, I noticed a bit of snow on the windshield. Not thinking too much about it, I started up the engine and 'crack ', the wipers went across the glass and one kept going out onto the driveway. It seems that the day before I had neglected to turn off the wipers all the way. Under the snow was a bit of ice that froze the wipers to the glass. Hence the loud crack when the wipers broke free from the ice. 
My son came out, found the parts and put it back together. So, lesson learned, at least for that day.