Debunk my experience

This is the part that Tim bolded. I'm curious as to what's the source for this claim?

From her report on her study:
https://www.amazon.com/Near-death-Experi...56&sr=1-11

Patient 17:

"The patient had frequent spontaneous OBEs during trance-like states that were observable by myself and other members of staff....I explained the research to him and pointed out where the symbols were hidden and asked him to look at them if he had another experience like that. The man had several more episodes during one of which  I was present and stood before him and pointed to the symbols and asked him to look at them. The man didn't see any of the symbols because he claimed to have 'floated' to the middle of the room opposite to where the symbols were situated."

Linda