Spotted in Manchester...

yellow bike, flat bar, leather saddle, Orange jacket near aquatics this eve...

... red light means stop, your saddle looks too low, and your gear is too spinny to comfortably sprint for any length of time (such as racing away from me in a comedy fashion).

oh, and your friends bike (grey single speed red tyres) was making a loud rattling noise.

Low seat for tricks, spiny gear for awesome skids, rattling noise was spokey dokeys