I had to do it before on an
I had to do it before on an ATV, so it's possible if you know what you're doing. I was taking a used sport ATV (Suzuki LT250R) for a test ride down some back streets of a city and the twist throttle stuck wide open as I was coming up to a stop sign. I immediately grabbed the clutch, shut it off, slammed on the brakes and got stopped right before I flew through the intersection. It was scary and completely unexpected, but I managed to pull it off before anything bad happened.