Maybe a better example would be my friend who took psychedelics and then believed he was in communication with Elon Musk. This one is more obviously a false idea, but nevertheless he was convinced it was real for a period after the psychedelic experience.
There’s a mystical concept that psychedelics open your third eye to see the world as it really is or something, but psychedelics are notorious for giving false ideas and making them seem like revelations. It’s obvious when it’s nonsense (like telepathy with Elon Musk) but it’s less obvious when the implanted idea is something like “your husband secretly doesn’t love you”. Another strangely common report is the belief that people around you have been replaced by clones, which can get scary very fast if the person can’t separate the idea from reality.
A fifth image of it done well was added in an edit.