This is after they've stopped eating for long enough to discard the
possibility that it's something they ate recently?  And again, to do
"herbs, drugs, enemas, colemas, hydrotherapies..." you must buy supplies.
 Could it be that people are a little eager to see results?  A few years
ago, a friend suggested a similar thing to me; a diet of nothing but tomato
juice for three days followed by nothing but grapes for a whole day.  It
was supposed to clean all that kind of stuff out of me.  What came out
looked suspiciously similar to tomato juice and grapes...

As for huge parasites and worms, I'd flat have to see that to believe it.
 With drugs, maybe.

Regardless, all of those things are off-topic here except herbs anyway.

Take care,
John Pavao

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On one of the intestinal lists I am on, there are several people who have
been massively "cleansing" their colons with herbs, drugs, enemas, colemas,
hydrotherapies, etc and still claim they are getting mounds of stringy
mucous out of the colon!! Others claim to get huge parasites/worms out of
there, some of it sounds  a little fantastic.