oh yeah, Ive had this loads of times. It happens a couple of times a week for me so ill just give a couple. Once I was in a dream and I needed to spit, so I go to the basin and spit and just as Im spitting I wake up and gob all over my pillow. Another time I must have been dreaming about PE or something because I saw my PE teacher standing up,telling me to do a forward roll. So I got out of my bed and got into the position to do one before it occured to me that he wasnt actually there. Also several times when I have been on checkouts too long I will wake up thinking im still on checkouts, its like being at work when sleeping