Beanied, neat stubbled young guy on what may have been a white fixie. A bit eager to get away from the lights at East Preston St, then waited well in front of the ASL at the West Preston St lights until the green man a which point he took off at speed dodging through pedestrians. As I waited for the lights I didn't see his exact manoeuvre but he had appeared on Melville Drive so I think had just gone straight through the red to turn left.
I made my reasonably leisurely way along Melville Terr, the links and Leamington Terrace and lo and behold there he was again just in front on Fountainbridge. So despite his ridiculous riding and impatience he made up no time at all. He also demonstrated further lack of courtesy by squeezing past other cyclists to get ahead of them in ASLs (or in his case the middle of the ped crossing).
Oh and this was in the dark and he had no lights or even anything remotely reflective on bike or self.
One of the few times I've wanted to shout at another cyclist, but couldn't be bothered catching up to remonstrate. Perhaps Darwin will have his way...