Depersonalization phenomenon as described in the Pali Canon According to the gentleman in this video ...

Enlightenment, DP/DR &amp; Falling Into the Pit of the Void ~ Shinzen Young
Shinzen talks about the empowering facets of enlightenment and compares this to &quot;enlightenments evil twin&quot; DP/DR. He talks about the rare occasions that he's encountered a meditator moving in the direction of DP/DR and the strategy he used to &quot;cure&quot; it using mindfulness methods.

... the phenomenon of &quot;depersonalization&quot; is described in the Pali Canon. Could anyone provide the source(s) of this?
As a secondary question- could anyone share their personal experience with/knowledge of depersonalization occurring as a result of meditation?
Thank you
It's hard to be sure what he's talking about, because obviously the Pali canon doesn't use the modern definition of DP/DR.

In the video he says a few things to describe what he's talking about:


That it's "DP/DR"
That it's very rare (so very rare that it shouldn't be used as a reason for not meditating)
That whereas enlightenment is liberating and makes your life bigger or fear-free, the "Falling into the Pit of the Void" experience/phenomenon that he's talking is the exact opposite of that
That it might even be the same (the usual) realization (of emptiness) as enlightenment/liberation, however in these (allegedly rare) cases the person reacts to it differently
That he (as a teacher) treats it by saying to such a student, "That's good! Now that you know emptiness you can rebuild yourself better than before" and then (like a physiotherapist would with an injured person) forces them to exercise (e.g. to concentrate on positive virtues)
He uses the word "nihilism"


I suspect that the description in the Pali canon (of derealization if not of depersonalization) might be of bhanga, see for example the descriptions in this answer.

I find it difficult to think of any place in the suttas where the results of meditation are described as pathological -- but one place might be the Vesali Sutta (which might be a description of nihlism).



The video doesn't say so but I wonder whether pathology/disorder might be understood as some imbalance (see for example, Balancing the spiritual faculties).



On the subject of "mindfulness" as a possible antidote, according to modern psychology "feelings of unreality (depersonalization or derealization)" can be among the symptoms of "panic disorder" and "acute stress reaction" ... and (to some extent Westernized) "mindfulness based stress reduction programs" is one of the clinical techniques that psychological therapists use to help to treat that.