I have finally found a flower that makes my brain hurt! Neville and Elizabeth are well known for their prize winning dahlias and this beautiful example shows why.
So why does this flower make my brain hurt? Try this; stare directly into the centre of the flower for about 30 seconds and then look away to one side. When I do this I find the larger petals explode in my peripheral vision.
Perhaps it's just me. Let me know how you go.
Photo: Robert Rath, '366 Days of 2012, Day 107 - Hot Pink'. 1/60 sec at 110mm f/2.8, ISO 1000