Why did this dude just head butt bullet proof glass?

So a guy and a girl got into an argument on St. Patrick's Day. Sadly, in today's day and age you probably think you know where this is going. But alas, there was no harm done, well I guess some self-inflicted harm. 

When the argument clearly isn't going his way, this guy stops talking and runs his head straight into some sort of bullet proof or unbreakable plexi-glass window...why you ask? Because he just wanted her to listen to him, duh!

Check out the video below...

WARNING: Someone in this video has a little potty mouth...