When you say you can "see the position" you're sleeping in, do you mean from a third person perspective or just looking at yourself from lying on the bed?

To me, it sounds like you're experiencing sleep paralysis. This usually happens when you wake up during your REM stage of sleep. When you dream, your body tends to put your body in a state of paralysis so that you don't act out your dreams and stuff. This is handy when you're dreaming, but when you wake up during this, it can be kind of scary if you don't know what's going on. So if you wake up, and "see yourself" just lying on a bed unable to move, you might have woken up during this sleep paralysis. As for the radio thing, I'm sure you can awaken with sleep paralysis with your eyes closed.

Also, sometimes when you are experiencing sleep paralysis, although you're awake, you're not fully consious, so you might start having hallucinations. Luckily you haven't experienced that. If you ever do, however, just make sure to tell yourself it's only a dream, and that no harm will come by it. You seem to have already mastered being able to tell it's a dream, so I'm sure you'll do just fine. Don't frustrate yourself in trying to wake yourself up too hard; it might take a while for your body to adjust from the paralysis to a normal state. How long, I'm not quite sure, but I'm sure you can find more information online.

Hope this helps! =3