6. Through the Slams and Jams (Quad City DJ's vs. Dragonforce)
If speed were the sole determining factor on this list, this one would probably take the number one spot. It's not, however, so this mash-up with Dragonforce's "Through the Fire and Flames" will have to settle for 6th. Still, if you ever wanted to really get pumped for something, this is the mash-up that might just do it for you.