i have definately had a full OBE after smoking a lot of weed from a bong. When i closed my eyes it looked as though i was floating above my body and all the surroundings in the room were there (even though my eues were closed) and they had like a "cartoony" look to them. It seemed as though my head lifted out and looked down and across my body. This was while listening to Pink Floyd "Dark Side of the Moon" whcih really tripped me out and brought it on i think.