I can't even imagine rolling a car on a test drive! The salesman always get all excited when I even chirp on the 1-2 shift LOL
I actually have seen the salesman get into more trouble grabbing the keys and getting into too much power.
True story: A close friend of mine worked detail at John Hine out here in san diego and Hine Jr (who now runs the dealership) is kind of a showoff. He dumped the clutch on a viper and it got out from under him and he put it into a wall in the back of the dealership!!
I wish I could have seen the car and the act, I just saw the wall.