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Did anyone see it today,tried to take a photo but it did not come out on my crappy phone.It looked like a smile.
The 'bow' that we normally see is a portion of a circle, with the light source (usually the Sun), your viewpoint, and the centre of the circle in a straight line - the sun behind you, the centre point in front.
If you happen to see a rainbow from a high altitude, eg an aircraft, it could be circular.
What you saw wasn't a rainbow.
It was a circumzenithal arc, so there!
Just found this
http://www.bbc.co.uk/news/magazine-35343629