BOOM! Exploding head syndrome is a form of hypnagogic auditory hallucination in which a cat sometimes experiences a sudden loud noise coming from within his own head. The noise is brief and is usually likened to an explosion, roar, gunshot, door slamming, loud voices or screams. This noise usually happens at the onset of sleep or within an hour or two of falling asleep, but is not necessarily the result of a dream. Someone watching the movie Black Hawk Down can be the cause.
Can you please turn down the volume!
Inspired by a Wikipedia article.