[QUOTE=Figaro]
You do it by keeping your foot on the gas while holding the clutch in that “just barely engaged” zone. The result is that the little bit of forward impetus from the engine and the pull downhill balance each other out and hold you basically still.
The result is also a tremendous amount of wear on your clutch.
It’s actually a wonderful way to hone your clutch skills. Too bad it’s so bad for the car 
[/QUOTE]
Oh, right. Yes, I do do this for fun sometimes. The clutch still seems ok after 110k.