On my last GA flight where I acted as safety pilot on an IFR flight
plan, I got a video
of our shadow on the clouds. So, I will letchya all decide in 43
seconds or less if I was over or in the rainbow

For those interested, the technical name you are looking at is called
a Glory.

http://www.youtube.com/watch?v=ysaiX8bWVfw

I found it fascinating how the size of the glory changes dramatically
based on distance from the cloud tops.

Allen