I’ve never tripped but it sounds similar to fever dreams I had a few times when I was sick as a child, running high temperatures. Why anyone would choose to experience that is another question.
Reading that McKenna was just another for-profit bullshit artist at the end of the day is the sad part. Exploring ideas and possibilities is a noble pursuit, but only if you can admit to mistakes and failures. Deciding to carry on to make money is weak and undermines everything. His legacy could have been as someone who dedicated his life to understanding psychedelics and gave an honest, well-researched evaluation at the end of it all. Money and celebrity status ruined all of that.