While traveling at about 40mph on a local road, I opened the passenger side rear window by mistake. The result was a pressure change in the cabin that caused a rapid thumping noise/sensation that was actually painful in my wife's and my ears. It was similar in some ways to pressure changes while flying in a light aircraft. I thought it might be a seat belt being whipped around by the wind stream, but nothing in the back was moving. With both rear windows down, it got worse. I've experienced wind noise from rear windows, but never anything like this. In my opinoin, and that of my wife, the RX400h is undriveable with the rear windows down. Lucky we never have them down. It rides like a dream all closed up, smooth and quiet. Front windows cause no problem.
Anybody else have a similar experience with the airflow over the car.
Stu