That's kind of the thing. You can look up videos that replicate the visual patterns etc. but there's really no way to gauge what it's going to do to you mentally, short- or long-term. If I had a friend who was displaying particularly unstable or depressive (or generally unhealthy) behaviors, I would probably do my best to talk them out of it, but even then it's a crapshoot.

They fuck with the way you think about things. For me, they cut through a lot of "abstract" thought layers and got right to the core of things that mattered to me at the time. It is refreshing to a point but can also get you on some lines of thought you really don't need if you're already prone to bad thought cycles.

An example. I ate too many of a particularly strong mushroom strain many years back and was attempting to read an Atlantic article. It got me thinking about what an archaeologist would think if they found this stuff, which got me thinking about how meaningless everything I do is in the scope of time, which put me on a train of thought that made it very hard to care about adult responsibilities for months after. Everyone thinks about stuff like that from time to time, but it was intense and very... true, for lack of a better term. I didn't need it at the time and it really screwed with my ability to function.

That said, someone stressed about some petty work bullshit may have the exact same revelation as me and find it incredibly freeing. It's all about where you are mentally at the time and a million other factors I'm not smart or observant enough to explain