parasomnia

People can have a sense of being hungry before bed and not able to get to sleep without eating something, or can wake in the morning to find the signs of a carbohydrate binge in the kitchen with no recollection of what has occurred during the night.
The cause of sleep paralysis isn't known. But it appears likely that many instances of sleep paralysis occur because of difficulty transitioning between different sleep stages, particularly moving in and out of REM sleep.
Without doubt, parents, teachers, neighbors, first responders and all of the bereaved are likely already dealing with acute sleep disorders, including insomnia, as the shock of the event fades into insurmountable grief.