It's maybe best not to give too much context to this, except just to warn you to turn down the volume and not watch if you might suffer from epilepsy.

https://www.youtube.com/watch?v=UJT8vfraCmk

When this was first presented, I was watching this in a large dark hall with this on the projector and the sound level set to extremely loud. Like a fool, I sat through this to the end wondering whether it was going to ever end rather than recognising it as a glorious troll.