I was once lying in bed and started feeling a fluttering or vibration sort of like a warm bout of the chills. Then I was floating up near the ceiling looking down at myself in bed.
I didn’t really know how to move around and kind of kept bumping into the wall and ceiling. Then I snapped back into my body feeling a bit disoriented.
I got a similar floating sensation a couple of times while I was walking to the bus stop when I was working in Manhattan.
Not sure what to call those experiences, but they seem like out of body experiences.