.. if you practice Astral Projection! 
I believe that I had one such experience. This was at a time when I was seriously messing with my body's electrical system and anything was possible. One night, I went to sleep with Deep Relaxation paraliminal (the 35 min one). When he says something like, "whatever your intention for this session, it will happen." ... Well, "I want to have an out of body experience..." Tape ended. Nothing (but deep meditaiton). Turned off tape, ripped off headphones, turned over and went to sleep. Hours later I was having one of the strangest experiences. If it was a dream, it was unlike any other I'd ever had. I was in my brother's town, outside of his house. The sun was just starting to rise (5 hour time difference). I paused for a while to admire it. No one was awake yet. I didn't have any legs so I was just floating around. At VERY high speeds. I felt/saw/moved like a grainy video camera on wheels. I started floating around the town and I found that I could go very fast. My vision seemed different too. Kind of ..crystaline or ..more particulate than smooth.
That's it. Just one potential experience.
My personal opinion of astral projection is that it is a waste of time--unless wanting to check out the lady's locker room. 
I try not to pursue frivilous things. Fun, interesting, but ... diversionary. There are more spiritually pragmatic ways to spend ones time. --just my opinion.
