Since I live pretty close to Sydney CBD a lot of my recreational riding is done at night when traffic is less. For the past few months I have been puzzled by an optical effect on some license plates. It seems to be mainly the smaller black/white plates that appear to colour change depending on the angle my headlight strikes them at. Sometimes the colours swap completely but in between swapping the background and letters are almost the same colour. I remember some gossip I heard a while back that I assumed was an urban myth, but have these people sprayed their plates with something that dazzles under a strong light, like a camera flash. Or are my eyes going the same way as my back and my hearing and my waistline and..I'm gonna stop there.