Amazing Left 4 Dead fan film will amaze you. Until it goes mad and jumps the shark SPECTACULARLY

Why? Why would you do this? Why would you spend a whole lot of time, money and talent on creating one of the most visually, atmospherically, tonally accurate depictions of a video game yet committed to film, and then piss it all up the wall by going batshit mental in the last few minutes?

People, I am disappoint.