I can only sign that.
I haven't done MDMA in a long time, since in the end it just made me puke,
but I remember 2 particular events where MD caused ridiculous hallucinations.
One was at a party where I saw my ex(together then) as an ethereal whatchamacallit, looked like a fucking ghost in the movies. I got startled and the hallucination was gone.
The second time was in a phase of my life I refer to as "the freakout". I suffer from paranoid schizophrenia, so I do have rather many of them, but this time was just crazy. I was taking too many psychedelics, and my mind was playing tricks on me (on purpose, kinda - my mind's a nasty fuck)
Taking the MDMA I suddenly felt watched after it kicked in, even more so after we took more. I felt watched so much, that I saw eyes appear out of nowhere(like in a wall or a curtain or just plain floating in the air), and once I looked into them directly, they would disappear. Still getting goosebumps thinking about it
Fucking devilish, that stuff.
edit: on both occasions I only took the MDMA, nothing else