Hmm. I don't have any very clear memories of events like these. The closest is something that happens to me every once in a while as I am (falling?) asleep - it feels closer to dreaming, though, even though I'm told that dreaming doesn't happen so quickly (within five or ten minutes). What happens is usually that what I think of as my dreaming self is walking, and then stumbles and falls. The sensation of falling is so powerful that it wakes me up all startled and clutching at my sheets; it's almost literally a sensation of having fallen back into my body.

I do sometimes hear things - my children calling for me when they are not, usually - but I think that's less a true hallucination than my brain being paranoid. (Mostly it happens while I am showering, thus: "Is that them crying? That could be crying. Although if it were a real cry it would be much louder." Etc.)