So I'm following this Great Egret passing in front of me, and I hold the shutter button down for some clickety-clickety-click, and he passes exactly in front of the sun!!!!
Do you know how bright the sun is??!?!?!?
Especially when viewed (however briefly) through a 300mm lens?!?!?!
It made me blink for a few minutes and see some spots for a while, but I'm all right. No permanent damage.