Top 10 hilarious and surprising viral videos of 2011

We decided to cap off the year with a list of 10 viral videos we especially liked. While you’ve probably seen at least half of these, there’s a good chance you haven’t seen them all. In trying to define “viral,” we’ve decided not to count any stunningly made professional videos. No music videos starring the notorious Rebecca Black or mega-popular Katy Perry, no crazy views of Earth from space and no stunning visions of the future are in the mix here.

Left 4 Dead short film rivals Hollywood production values (video)

As the gaming culture matures, a handful of impressive fan films paying homage to popular titles have continued to emerge. First, the “Escape from City 17” Half-Life shorts from two years ago set a new standard with their Hollywood-lite production values, then earlier this year Modern Warfare and Portal received similar treatments. Now another Valve-published game, Left 4 Dead, has been reimagined in this live-action eight-minute film.