blitzile

I stumbled on this glitch a few years ago (you can skip the cutscene - had to record it with my cell at the time) and was curious if anyone knew about it, why it happens, or a better way to use it? <iframe width="560" height="315" src="https://www.youtube.com/embed/ESXiCnjYk0w" frameborder="0" allowfullscreen></iframe>