I'd have to say the whole experience in making The Neverending Story. I had an incredible time.
No one who set out to design a form of communication would ever end up with anything like English, Mandarin, or any of the more than six thousand languages spoken today.
We usually use that mostly on the weekends because we have access to the range during the week. But I can tell you a number of times they have had a training holiday at Fort Benning, so nobody trains, and to drag him in is like pulling teeth.

