Thanks for such a quick response! For those of you who haven't ridden a Segway, it's still pretty fun and after a very short while it becomes really simple. It's not tough, if you remember just a few things --
1. Remember to turn on the stabilization system before you mount up. (Green Mac-type smiley face). Do not attempt to just hop on without this or you'll wind up taking a spill like the President did. Note, his Dad listened to the directions and didn't have a problem

...
2. You're going to try to overcorrect for any movement the first few minutes until you really learn to trust the Segway. It's only natural and it's normal. After a little bit you'll realize that the machines are well built and you can put some faith in the gyros.
Really, going forward and back (at least to me) is as much about gently shifting your weight from the center of your foot to either the balls of your feet or your heals. Smoothness is a matter of subtlety (again, see tip #2)
3. If you think you're getting in over your head, squat. It slows down and stabilizes VERY quickly.
4. When you go to park the unit, don't forget to turn it off! After a while of riding the thing it just becomes so instinctive, you almost start to believe it can read your thoughts. Unfortunately, "Sit here and wait for me" isn't one of them!
5. If your Segway has the retractable kickstand, don't forget to retract it before stepping on the unit. You'll snap that plastic in a heartbeat and it's around $100. No, it wasn't me but a coworker who found that out the hard way...
I wouldn't want to discourage anyone from riding a Segaway at least once in their life. It is fun and a marvelous piece of technology -- and where better than Epcot?
Servants of Evan
We use ours in our convention center and it really cuts down the pounding your knees take over a day...