My husband stated he had a weird experience that he thought he was going to die today. He was driving down the road when he suddenly felt like someone was squeezing his head then he suddenly lost his hearing and began to lose his vision, his eyes began wondering and he couldn't control them. He slowly pulled off to the side of the road because he thought well this is how I am going to die. The back of his head started to burn and he stated he could actually feel the heat. After about 1 minute everything was restored. What causes this?