1. A Serbian Film (2010) - Every Scene
The. Whole. Damn. Thing. I'm a pretty liberal guy, and all of the other entries on this list aren't what I deem offensive, just taking it a bit beyond the watershed. A Serbian Film is a totally different Animal. Rather than describe it in detail, I'll let the wizards over at wikipedia take over at this point. Who ever read this script and thought it was a good idea to green light it has to be one of the mysteries of the human condition. You can talk about it being a political statement all you want but that still doesn't make me sleep sounder at night knowing a special kind of crazy is out there bank rolling international movie releases.
http://en.wikipedia.org/wiki/A_Serbian_Film