They only come out at Night

Mechanical jockeys at night,

They are giving some people a fright,

With their pedalling clatter nothing else matters,

In the daytime it would be such a sight.

Some are on plastic, some are on metal,

If they crashed in a heap they would all need some Dettol,

Adrenalin pumping - some of them jumping,

Just don't get in their way or you might get a thumping.