In a lot of videos I see, specifically of electricity, once electricity or lightning occurs it seems like the sky goes dark or everything surrounding it briefly goes dark. I also noticed this with the flash on a phone while using it indoors. Why is this? Is it just due to camera exposure not being able to adjust to the flash? I believe this also occurs in real life, too, so do our eyes also not adjust in time and just go by the comparison? It seems like that would be a stretch for the resulting effect.