I wouldn’t think that would shake your head enough to move the crystals around. But just my thoughts. I have woke up a few times with my head spinning and no idea how it was caused. Another time I know exactly what caused it. My clock had fallen to the floor next to my bed one night. I hung my head off while I retrieved it and then flung my head back up hard and fast and I felt it begin. In the morning my head was spinning so much that I threw up just walking to the bathroom. During those times I have googled the Eply maneuver and tried to do that while laying in bed. It might not work immediately, but I think it helped. Thankfully my episodes have lasted less than 24 hours.