While waiting at a pedestrian crossing, I listened to a dance track with a pumping bass on my MP3 player.

I glanced up and jerked my head back in surprise when I saw that a pigeon sitting on the beams of the rail bridge above me was bopping in time to my music.

Bop, bop, bop, flap! Bop, bop, bop, flap!

The pigeon did this for about three bars. Then it stopped and it eyed at me.

I crossed the road.