Has anybody experienced their child hysterically laughing during sleep. DS (5) has gone to bed regular time for the past 2 days but between 10 and 11 has woken s up to him hysterically laughing. It's more than hed ever laugh normally and sounds manic. Hes completely asleep and it lasts about a couple of minutes, hell then wriggle for the next couple of minutes and move his face a lot and go back to sleep. I have woken him both times straight after as it was truly unnerving and hes been fine but has no recollection. Has anyone else experienced this with a child? I am getting an appointment with gp but they're few and far between.