1. demoniac activity
2. memories of ones childbirth: doctors with masks,probes etc for a newborn entering the world for the first time it is a traumatic experience.
3. memories from sci fi shows.
4. victims of hoax or government coverups of new technologies.
5. outright lies
6. waking dreams
7. mentall illness
8. man as He wanders away fom the light of the gospel falling under the power of superstions etc