That definitely should have been a 2nd Amendment moment. I get the feeling that man wasn't in his right frame of mind though, retard strength and all. And he had the advantage of dude being completely caught off guard along with dude being seated while he's standing over top of him. Dude would have literally had an uphill battle. That said the moment dude gave him space he should have got up and handled his business. Then again with this being recorded he might not have been alone.