I found a new way to accidentally launch your car when you don't expect to.
Go to the gym and work out with the weight machines until you can't see straight, and then go wobble your way out to the car. Start it and sit there holding the clutch down while you buckle up.
Now get cramps in both legs (it's got to be both legs, or it won't work). Have your left leg cramp up, and your right leg cramp down. That way you come off the clutch while you mash the gas pedal.
You can successfully get a full car length distance out of your parking space before you knock the shifter into neutral. Then you lift your leg up and drop it on the brake pedal. Yea, I guess I could have yanked the e-brake handle instead.
Most embarrassing. I think I'm going to start taking longer rests before I try to drive away from the gym in the future.

