Anybody else make the mistake of only rolling down the rear windows while going about 60mph? I did this the other day (planned to roll them all down & went for the closest switch first), and the car stars shaking violently and making a loud drumming noise. It scared the crap out of me. I've never had this happen in any other car, but then again, the only other 4-door cars I've owned have been sedans instead of hatchbacks. Does anyone know if this is a common issue with hatchbacks, or is it just an issue with our specific cars?