If that happened to me:
*pulls out the Remington 806 that was in the back of my car and point it at them and yell at them to get out of the car then grabs the snow shovel the back and whacks him on the head and screams swears and calls the police but say I'll be dropping off an unconcious or dead prisoner and you have everything under control then call my BFF and we both get out the big guns (literally) and knock him unconcious by hitting him with the gun handle and drop him off at police station*