The anti-terrorist forces were also equipped with battery-powered segways, each about a meter high and with two wheels.The ability to steer with no hands would be useful for police, but having to clutch the steering column with your knees would not make for a comfortable ride, or a steady platform to fire a gun from. Perhaps a bicycle type seat needs to be attached to the Segway, to allow the rider to sit down. This could be elegantly added to the Segway's steering column, where it bends about one third the way up.
The segways allowed the armed police to control direction and speed by changing the gravity center, leaving their hands free to shoot, said Huang Shan, a provincial special force vice head.
"With a speed of up to 20 kilometers per hour, the vehicle helps transport troops and shoot accurately, fast and silently." ...From: Unmanned drones to serve security forces during Olympics, Xinhua News Agency, 2008-07-03 22:55:45
For less crowded areas, a motor-scooter might be a better idea than a Segway. The Greek police have two people on one scooter (presumably so one can drive and the other take action). These look a little cramped and something like the Piaggio MP3 three-wheeled scooter would have more room and carrying capacity.