I turn into a zombie when nearly asleep. You can help me stand up, order me to do things and I will obey with no memories of it happening. If you order me to go to another room (e.g. the bedroom, as my girlfriend does), I will be very confused next morning.
The term zombie comes from Haiti and there might be a partly medical process involved. Here is a link I found with a quick search (that mentions at the end that there is some criticism of this theory):
Confused how I appeared there - even though I can deduce it now. It's a very strong feeling of missing information that does not go away even after she tells me.
