I woke up this morninng and my legs were completely numb and paralyzed?

i wouldn't say they were asleep, they were more in a coma than asleep (i couldn't feel them or move them at all). i got them back to normal but i don't know how long they were like that and they've never done this before. do you think they may have incurred some permanent damage, i mean from the lack of bloodflow? also, i was having a nightmare that i was watching a Polly Shore movie if that has anything to do with it hahaha