Random Assignment

So in one of my creative writing classes, we're exploring different literature in different cultures. Currently, we're working on researching about Mexican culture. So this morning, Mr. Craddock gave us a list of some Mexican directors and we were told to youtube search them to see some examples of their work. The first person on the list was this director named Luis Bunuel so my friend Kelly and I clicked on one of the videos that came up and this is what it was- but just so you know, the video is a little disturbing:

http://www.youtube.com/watch?v=CZE2w0QlmVU

You're going to have to copy and paste the link because i can figure out how to put up the actual video from youtube. But not only was this video completely random, why would someone choose to create a little film about it?