the auto punch is most commonly administered by bicyclists to the windows of motorists encroaching on their left at roughly equivalent speeds.
punching the back of a truck that entered an intersection 100 feet before you, but was slow moving due its size and intersection dynamics is a new one to me.
yelling at him so he'd stop so you could more easily punch the back of the truck is crafty.
what time of day was it, and do you run daytime LEDs? More motorists yield their right of way to me when I run a high intensity (150 lumens) LED on flash mode.