S.L.
yeah- both my children do that. But my son actually sleep walks. he sleep walks to the bathroom and uses the toilet the back to bed. there is one time he came out of the bed room, went to his play room and stood there infront of the bed and got ready to go pee...I stopped when I realized what was going on.
He sits up in bed, talks and so on and never remember when he wakes up! Rather amusing!