golf carting
when you drive a hybrid automobile in a manner that it only runs on electricity and it is almost silent and it sneaks up on pedestrians and they are startled or surprised by its lack of gasoline engine noise.
I turned off of the freeway onto my street and I was golf carting all the way home.  I used no gas.  The engine never fired-up.  Scared the shit out of my neighbors and their dog who were walking.