Last night was like any night, until I woke up in the middle of the night and couldn’t fall back to sleep. I decided to get into a different position to see if that could help me sleep. I closed my eyes again and then all of a sudden my eyes felt very heavy, my breathing almost stopped, and my head dropped hard on to the pillow and I couldn’t control it. I was scared of what was happening so I “woke” myself up. Minutes later I tried to fall asleep again (in the same position) and the same phenomenon happened again. I then switched positions, and fell back to sleep like I should have.

Why do you think this happened??