I hear some sort of cracking sounds, and why my head moves unvoluntarily, and sometimes my eye wiggling very fast and its like someone dragging or pulling my feet or body very fast,  physically but its not, i woke up some sort of afraidness, pls explain...
I might suggest starting with my "power nap" tracks until your brain gets more accustomed to hearing binaural beats and recognizes them as friends (instead of, perhaps, threats). :)
http://bit.ly/powernap-binaural-20
Procopio bonifacio