do si do is a cheat...
for the sake of clarity, Do Si Do = sMurf, who's in the first vid. He played ONS tourney ladders back in the day and is just a good player. When UT3 came out a lot of people accused him of turret botting also. Thing is there were other players who's bender skills were very close to his but he's prertty much the last one that still plays so receives a lot of attention.