I really enjoyed reading this, @apolymask :) I've had a lot of encounters myself which I didn't dare share LOL
I think there are some benevolent beings as well (we just hear more about the bad experiences) and always remember that you have the power inside yourself to choose the experience you have.
I see those flashes, too! So interesting. I thought I was going bonkers or my eyes were playing tricks on me. Then one day, my husband and kids and I were stranded in a boat on Father's Day ('someone flooded the engine ; ) and I saw one of these flashes and happened to have my camera out so pointed where I saw it and I'll be darned if it didn't pick up a bright ball of light. So I started playing with this for months - and it happened every time. It didn't seem to matter if the flash I saw with my eyes was gone when I photographed or not. I can't definitively explain the 'why' or 'what' but I can say it is not your imagination.
It's definitely a fascinating subject. Thanks for sharing your story and experience with it.
It's been fun!