I have always been taught to fear the OBE. That leaving your body behind makes you susceptible for other potentially malevolent forces to enter in your body and plant their virus code inside of your mind.

I have experienced sleep paralysis on many different occasions, it is a very frightening thing not being able to move your body like that.

It's easy to say my understandings are ruled by fear, but I do believe there are some truths inherit in those fears. Better safe than sorry. Interested article though!