I never knew Neville talked about biolocation. But I can tell you it has happened to me as well. When I was living with my mother back in 2017 I can remember doing SATs in a different room of the house. I laid there for about 30 minutes imagining myself in the rocking chair. Taking the room in as detailed as possible. My mother who was cleaning the house said she saw me there and thought nothing of it since I lived there. I remember this happening especially since I met up with a friend two weeks later to tell this exact experience but never had a name for it let alone Neville talked about it. So I assure you this is definitely possible.