After three years, I've never taken a drop more than eight feet.. and anything higher than five is extremely rare. I know I can take fifteen if I REALLY needed to and my life or someone else's depended on it. Know how? Because I've trained at ground level for it, and I've conditioned. that's your safety net. That's your foundation.
You're smart to not to do it again. But you shouldn't have done it in the first place.