He zapped the driver with a taser after breaking through the car window of the back door and was surprised the victim was no longer in control of a vehicle in movement, from what I’m reading. The court papers claim he was breaking the window to open the door, but if he was able to use the taser in that way he must have been already wielding it. It wouldn’t surprise me if what actually happened was that the moron used the taser and that it caused the driver to compulse and press on the accelerator. It’s not like he isn’t gun-ho.