They all disrupt sleep and often cause groggy days and a great deal of yawning. But mankind has put the dream disorders to some good use over the ages. It would be a duller world if we didn't have our dreams. That Terrify Everybody dreams. Most people have an occasional nightmare.
Some people suffer from night terrors, sudden, frightening interruptions in sleep.
It's probably an episode of hallucinogenic sleep paralysis. Almost everyone has been frightened by the occasional nightmare. Children are often terrified by these frightening dreams. How to Deal With Night Terrors Night terrors are not the same as nightmares and the treatment is different as well. The answers to these questions plus information on how to cope can be found at this site.