The rare phenomenon that occurs when sleepwalkers go online and send e-mail in the wee hours of the night.
Zzz-mail: What happens when sleepwalkers go online
Doctors have reported the first ever case of someone using the internet while asleep, after a sleeping woman sent emails to people asking them over for drinks and caviar.
One read: "Come tomorrow and sort this hell hole out. Dinner and drinks, 4.pm,. Bring wine and caviar only."