My son woke up this mornig crying and shaking and very upset. When I asked him what was wrong he said he'd had a bad dream. When I asked him what it was about he said that his Auntie was doing the dishes and she fell and her boyfriend wasn't there to catch her and her head fell off and she died. I have no idea where he's got this from. He doesn't watch violent shows or anything. Is it normal do you think for a 4 year old to be having such violent dreams?