@phemox: The hud is a combination of view entities and panels.
This is the "burning the zombies with your flare gun" effect.
Of course - the very early stage. Fraps slow down the rates, in original speed (70fps), it looks cool.
Now, I have to work out the fire, illu and so on.
[video:youtube]
http://www.youtube.com/watch?v=ZPAEOmnIdtU[/video]