This sort of thing can still happen with a manual. I used to have an S-10 with a stick shift. In the winter I would go out and start it to warm it up, then go back inside for a few. One morning I got lazy and just put my right foot in the door to hold the clutch while I started it. I had some snow on the bottom of my boot and my foot slipped off of the clutch with the truck in 1st gear. The truck nearly stalled, but then instead proceeded to take off down the driveway throwing me to the ground. It slammed right into my other car doing minor damage to both vehicles. My friends couldn't believe it.