Meet him. NOW!
Thank you very much to those manic reprobates who I had only met that session for doing this. 'Twas a lot of fun. I'll probably upload a behind-the-scenes video of this because it was completely insane and tiring trying to get this all done. As you can see in the background at times.
I also may make an updated one with a Garry's Mod bit or two in it. Because it's 1:30 AM and I can't be bothered. That, and I don't know how Stop Motion Helper works. Though a proper thumbnail wouldn't go amiss...*
*(24/03/24) There we are, the thumbnail is done.
Sources:
Monty Python and the Holy Grail (Intermission)
Street Fighter 4: K.O Green Screen
Team Fortress 2: Meet the Spy.