This Russian dude picked the wrong waitress mess with. His first mistake was attempting to stuff money down the front of her shirt. That was met with a slap across the face.
His second mistake was grabbing her ass. For that she hits him twice across the face knocking hm down and leaving him a little woozy.
It looks like he learned the hard way not to mess with her.
https://www.youtube.com/watch?v=GNTstH7Yai4