One handed push?
Grab the forearem, turn away, drop your upper arm over his elbow and sink your weight to the floor (called Hiji Osae or something like that - aka basic arm bar).
After he kisses the floor, hold him in the pin, pull out your 9mm, press it to his temple and ask him - "Do you feel lucky? Well do ya Punk?"
Apologies for this post, been watching too much Eastwood and been dealing with too many abusive little punks lately
But the arm bar should work.