I haven't read anything by/about this Belgian neurologist, so I can't say one way or another about it. But I will say I very much doubt he could re-create the medical condition of Dr. Alexander. His description of his medical circumstances are to my mind unprecedented and could not be duplicated by any iatrogenic manipulation.

As for other examples of unpleasant NDE's, there are many out there if you care to search. It isn't hard to find them.

"I'm gonna have to science the schit out of this." Mark Watney, Sol 59, Mars