This have happened to me once.
When i was younger (about 5-12) I constantly had the same nightmare.
The setting was a warm and awesome summer with hills filled with trees and happy animals (kinda like something out of bugs bunny series)
!
There I was skipping and jumping around with joy.
So, now ther happy part is over, becaus whenever i had jumped around enough in the nightmares, the 'enemy' appears.
! Like this one but without the top part.
Okay so everytime this saucer appeared I would get shitty scared, crying and eventualy start to run, and the sunny weather turned into rain.
Usually the nightmare ends with the saucer cathing up to me and frying me to death with its lazers. :sad:
However, the time i actually could somewhat 'controle' my actions, I just couldnt be arsed to run and just sat down and waited for the saucer too kill me.
At the time im being killed i always wake up and on later years ive had this nightmare a few times but never been able to controle my actions.