"hand throttle was NOT designed to get you to "gain forward momentum up massive inclines"
it was designed to give you the ability to use the throttle WITHOUT using your feet - ever heard of the old Capstan Winch - or a PTO........??? you use a hand throttle for those"


Its called a hand throttle because it's a hand throttle. We all know you don't need your feet to use it. Anytime a winch is used, an operator needs to be in the vehicle to maintain control if something snaps or otherwise goes wrong, otherwise the car goes on its own way uncontrolled. The procedure for that is simply open the bonnet to shield the person in the drivers seat from a snapped cable.

"looking at situations where you're stuck stationary on dangerous slopes when you need the grip of four calipers on the disc/drums.
mate, if your in THIS situation, you have OTHER things to worry about - like just HOW did you get in this predicament......"

If you're stuck in said situation, what you need to know is how to get out of it.

You sound like someone who'll end up injuring somebody else, if natural selection doesn't take its course first.