How to do the "soulja boy" in halo 3?

[MIKE a]

I know you have seen a video of people doing this. How do they do it

 

[SEBASTIAN M]

never heard that before im curious also

 

[Fabregas]

http://www.youtube.com/watch?v=82UmKN0ycvo

 

[GHOST]

if you die in a sertain way you can do it ive done it and took a screen shot

 

[Lenny K]

idk but it sounds kool lol