About two years ago, my sister gave us quite a scare. Honestly, we thought she was having some kind of psychotic breakdown. She complained of hearing loud, crashing sounds or sounds of an explosion as she was falling asleep. She said that she would see flashes of light and would wake up screaming. We thought she might be having nightmares.
After several weeks of this, she finally went to see a psychiatrist because she thought she was, in her words, “going crazy”. A sleep study was done and it was determined that she had exploding head syndrome. The doctor said that it was a sleep disorder classified as parasomnias. She is doing much better now.