Last week Chris and I begged our superior full-time friends to take out one of the company's Segways over lunch and teach how to use it. I won't go into too much detail since the entire affair lasted about 20 minutes, but here is a (hopefully amusing picture). Out of my way Simon!!
In order to maneuver, you just lean forward, backward, and side to side, depending on which way you want to go. It's pretty intuitive, but you have to completely trust that it will catch you, even though you feel like you're just going to fall flat on your face.