HATR3D, who made that hack UT2K4 video?  Oh and thanks for showing me it.  

I noticed that this guy is a fan of Arnold  Schwarzenegger (2:16 in the video you linked). I've suspected Kingtoot of hacking for a while now.  Kingtoot is also a fan: http://www.youtube.com/watch?v=rSCukJTiIkU

Those combos don't look impossible.  But this next video he posted looks like hacks to me.  
http://www.youtube.com/watch?v=BpX3MLnAoNk

If you're reading this, jet/toot...sorry, bud, I just can't help but find you suspicious.  And you know this cause I've asked you about it.