If you haven't seen OneMoreUser's Team Fortress 2/Law Abiding Citizen mashup, "Law Abiding Engineer," you should go watch it right now. We'll wait. All done? Good. Now that you're familiar with OneMoreUser's work, it's time to watch his latest masterpiece.
We think the name alone should sufficiently pique your interest: "The Demo Knight." There, now watch it after the break. Also, you're welcome.