The Unexplained Flash…
My sister and I were in the living room when a bright flash emanated from the back corner of the room. The flash was intense and lasted only a fraction of a second, perceptually of course it seemed to last longer (due to visual sensory memory). We were not on computers, nor watching television. Also, there were no electrical devices or light bulbs that blew out. We both looked at each other and confirmed the experience. To replicate the event, I took several cameras and took pictures to create a bright flash in the general direction from where we mutually agreed it came from or was localized at. Meanwhile my sister stood exactly where she had been when the event occurred. Then we rotated and I stood where I was when it happened while she took several shots from various angles. Both of us agreed, beyond all doubt, that what we experienced was both far more intense and “different.” After failing to replicate the flash using cameras, I then decided to use a high-powered flashlight, that has more luminosity than a car's bright beams, and still it failed to resemble the phenomenon. All of this was done moments after the event, we both were eager to solve the mystery then and there. Then....
Approximately a year later (possibly longer) my mother and girlfriend claimed to have seen a bright flash appear out of nowhere in the corner of the living room. I had never told them about the “flash” experience before and thus I can say “4” people have experienced this flash in pairs - with each pair confirming the experience among themselves.
Their stories of the experience were remarkably similar to ours, even where they believed the flashed came from was similar. However, no more insights or clues were gained…
Any clues, insights as to an explanation?

