The thing is that even bad trips can be very, very useful if you treat psychedelics as a tool for exploration of your mind. I had two super bad trips - with 7g and 5g dose, in both I felt like I'm trapped in my mind and there were no world outside of my mind, and that idea was constantly repeating, with me feeling that there is no time and it will be forever like that - it was like pure hell :) Ultimately it was mind opening for me and I would recommend mushrooms to others if I knew that they are mentally strong and healthy.