Now, while Craig watched, the disc tilted and raced towards him.
A guard shouted. As one, he and his fellows lunged forward.
Craig hurled his stone. By more luck than good judgment, it caught the foremost guard square in the forehead.
The man went down like an axed ox. His fellows stopped short.
In the same instant the disc whipped round in a tight spiral close by Craig's side. "Get on! Flat between my legs...." The rider's voice rasped raw and urgent.
Craig threw himself aboard.
Angry cries from the guards. Green fire spurting.
A shout from the discman: "Hold tight!"
Barely in time. Craig caught the disc's rim.