it is perilous to object to someone who says they feel as if they are out of body.

I don't object to that in the slightest! Saying you feel like you've been out of body is not the same thing as asserting that you have been out of body. I have this recurring dream in which I have to obsessively buy cheap brandy in a branch of Sainsburys with a very strange layout. Very detailed it is and it's the same every time. Jeez, it's so real! I hate brandy, too! I might tell you that I felt like I was doing that in Sainsburys and you'd hardly object, but if I tell you I really was transported out of bed into that Sainsburys, you'd know I really was away with the bloody fairies this time. You say you've been out of body? Well where's yer evidence then! Anybody can say anything, can't they!

Oi, Mr Alien...put me DOWN!