a glimpse of a green flash. Please view large to see and perhaps enlarge (ctrl + mouse scroll wheel)
Technical bit below: (taken from wikipedia)
These occur shortly after sunset where a green spot or ray is visible for only a fraction of a second or a few secs. Caused by refraction of light in the atmosphere, light moves slower in the lower denser air than thinner air above so sunlight follows paths that curve slightly in the same direction as curvature of the earth. Green/blue higher frequency light curves more than the red/orange lower freqeuncy light therefore the green rays from the upper part of the setting sun remain visible after the red rays are obstructed by the curvature of the earth.
if only i had a bigger zoom!
Thanks for looking or reading