Mountains?Just tried that brake a couple days ago. Found a downhill ramp and gave it one press. Truck slowed down and kept on slowing. Not dramatic.
Later on the other side of that downhill I did a "double press". That is supposed to just keep the same speed and not speed up but also not slow down. Nothing really happened as the downgrade was not all that long. Oh well. Next time I run down a mountain in Florida I will test again.
Oh yeah, there's some that I have seen on the beaches there