I didn't take it seriously either. Argued with her every week about truth and reality-testing and evidence-based medicine and scepticism and science and rationality and ethics, and ended up labelled with a rather unpleasant diagnosis in retaliation that I wasn't told about at the time and which has followed me ever since.
It was unhelpful, manipulative, damaging, even - a complete waste of NHS money for me and I suspect for everyone else in the group (I was the only one who made a dramatic improvement during the eighteen months or so - it happened suddenly, a couple of weeks after I saw a new psychiatrist (who happened to be a specialist in drug treatments for treatment-resistant depression, and was involved in the development of several of the current popular antidepressants) who prescribed the MAOI + lamotrigine combo that stabilised me for several years and left me able to manage without drug treatment at all for several years afterwards).
That bloody woman. She's still practising locally. Calls herself Dr but makes no attempt to disabuse people of the impression she's a medical doctor (and I know a PhD is a higher level qualification than a medical degree but I still think PhDs working in healthcare should forgo their title at work), and refused to tell me her specialism or area of expertise for several months after the group began despite my asking her repeatedly what her methodology was.
Introduced a trainee to the group partway through, constantly talked about our fantasies, positioned herself as our mother-figure in the group and referred to our fantasies about her, tried to position this trainee as a father figure, tried to use group dynamics 
to "model" stuff like the poor woman whose father was repeatedly raping her, got the entire group to write a letter to me telling me why I had to come back for my own sake and for the rest of the group when I chose to leave partway through.
Got me to sign up for the group in the first place when I'd been referred for a different kind of group and for individual therapy by promising me I would get individual therapy afterwards, then lying and telling me she'd never said that (luckily DP could back me up there so confirm to me that this was gaslighting) and that it was a sign of my disorder that I felt I was too good for group therapy .
Ending the group abruptly with only one session's warning, leaving lots of very vulnerable people who were mostly no better than they were at the start without their main form of support, denigrating drug therapies at every stage, while making no attempt to address various people's addiction problems…
The whole thing was a mess and probably just a Petri dish for another one of her many published papers full of absolute crap.
The hearse thing was when I turned up late once having been held up in slow traffic caused by people driving respectfully around a funeral procession, and apologised, saying "I was held up by a hearse". This apparently merited fifteen minutes discussing my obsession with the death-fantasy and its manifestations in my reality and why I felt the need to avoid my life using the fantasy of blah blah blah I forget.
Oops, that was long.