If you haven't seen War of the Servers, then you really need to. It is, of course, a spoof on War of the Worlds, but this is an actual movie, an hour and thirty minutes long, entirely in Gmod. The music primarily is from the War of the Worlds musical verison, which is worth hearing if you have the time. http://litfusefilms.com/movies/ The other movies on the site are shorter, but worth watching.