Crowds, mostly. Getting squished or feeling you can't escape, touching people you don't know, lots of noise, overload. Emotional overload too, that goes all the way back to Elvis and probably further, my mum could have done with a mental health safe space when she saw the Beatles...

Physical plays a part too, dehydration or exhaustion can be pretty heavy triggers especially for those unused to it. Plus, sometimes too much drink, or drugs. AND there was this whole pandemic thing, even old hands like me are still not really match fit (it's really only this year that I've really got my gig reflexes back, and that's a skill I'd been working on for about 25 years) lots of people are less comfortable and there's this whole surge of new gig-goers that missed out on 2 years.

Last bad one I helped with was at a my chemical romance show- panic attack, the person had some history of that but it was triggered simply by the excitement and the anticipation kicking them into a state of emotional overload, and then that getting magnified by feeling surrounded and not able to get out so it got really bad. It was the person's first big show post-pandemic too.

(and exactly like Yungblud, there you've got a rock show that'll be attended by a lot of people that are not normally at rock shows, so inexperience and other people's experience is a multiplier. Only reason I was involved- most of the kids around them were inexperienced, I'm an old hand.)

Last one I had, was at a Sepultura show, I was having a great time but I just plain ran out of oxygen in the pit and couldn't get myself out, and then in that state being helped did not feel like being helped. I've gone to hundreds of gigs and been in hundreds of pits but that was like flipping a switch in my head. Never happened to me any other time at a show, even at properly dangerous ones when people have been leaving in ambulances, I'm usually the person that hauls other people out. That's the nature of a mental health crisis really, it's not predictable, it doesn't follow rules.