For the first time I've seen that today on my way back home from work. I had only my phone with me , as it happens when I see something really interesting, and stopped the car to take a few shots. For those that do not know about it, a quite nice explanation is
here
20022012028.jpg by
Radu Coman, on Flickr
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Radu
Canon PowerShot S100
Canon 50D , SIGMA 10-20 f3.5 ,Canon EF 24-105 L IS USM, Canon EF 100/2.8 macro Canon EF 50/1.4 ,Canon EF 85 f1.8,Canon EF-S17-85 4-5.6 Old Tamron 28-300 inherited from my Canon Rebel G film camera
Canon580EXII
http://www.errre.net