Too many pages to read and not enough time... But I did read the original posts...
I did have an experience that was shared with my brother and four others that was unexplainable... involved something similar. And then my brother and I were host to such a "guest" for nearly 3 weeks afterward.
I'd go into details... but I'm sure most would think I was nuts. All I know is both trucks had claw marks in solid metal, and I still have a few scars on my arms... as does my brother, from the ordeal. And our friend Heather... is still in the psychiatric hospital undergoing treatment... almost 7 years later.
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen