Well, this happens a few times each year. Last time it occured was a few days ago. The last time it happened I was home, I was really tired and I wanted to get some sleep and it was afternoon. The night before I only slept about 3-4 hours. Anyway, when I was about to fall asleep I heard a loud noise, really loud and I couldn't move and this happened everytime I tried to sleep. Like, 5 times. Then I started the TV and when I tried again, it worked.

So, my question is: What happened to me and what can I do to prevent it?

Thanks in advance, and I hope I posted this in the right forum.