21.   Most of us use our bikes for pleasure and to commute, often glad just being able to avoid getting trapped in traffic jams.

22.   The CPSC said consumers should stop using the bikes immediately.

23.   Then there are the illegal road-racers, using their bikes to get a thrill and sometimes finding a shortcut to heaven or hades.

24.   The feats attracted more attention than usual because Obree used a bike constructed of scrap metal and a racket from a washing machine.