A group of teenagers who I work with introduced me to this. I had no idea that it existed, even though it's been around since 2006 (which is evidence of how cutting-edge I am). It depicts a battle between a stick figure and the animator who drew him, both of them using all of the weapons at their disposal on a Windows PC. The guy who did it, Alan Becker, was only 17 years old when he animated it and has gone on to make a whole series of the things and has also posted videos online showing how he made them.
Unlike the teenagers who I work with, I can only watch these for a few minutes before animated gifs hurling lightning bolts and cursor-arrows at each other becomes slightly tedious and my attention wanders. Still, I think this shows great promise for the animator's future career.