TAS Speed Runs stand for Tool Assisted Speed Runs.
While the speed run community is divided a bit on them, I think they are by far the coolest speed runs.
Perhaps the coolest TAS I've seen is the one for OoT.
I don't know if you guys have seen it before, but figured people might want to. When I first watched it, my mind was blown and I shat bricks.
http://www.youtube.com/watch?v=XzOFb...3625F0&index=0