Salvia is possibly the most intense hallucinogen I've ever had. I'm sure this is boring news to you. Everyone says the same shit, but honestly... I really don't think anyone has ever truly been able to communicate just how twisted the stuff is. Honestly, thinking about it scares me. I've done LSD in my time, and I've experienced some amazing ego swapping before, but never have I experienced ego deletion before. My very existence shattered, the meaning of life explained and then made ever so pointless in such an instant.
I would explain LSD hallucinations to me as external hallucinations. Seeing lights morph, peoples faces change. The room move, etc... visual, audio hallucinations twisting in your mind and soul before your eyes. Your ego reflecting this new world being created making a wonderful paradigm outside of your realm of command. That's awesome stuff.
Salvia is an internal hallucination. Your eyes are open, but it is not your eyes that are seeing. People are talking to you, but you may not hear them, what they are saying is not what you are listening. You may be sitting, but your body is pretty irrelevant. You are not really there. The kind of hallucinations I've had with Salvia break my understanding of what being "high" is supposed to be. Even in controlled environments with a friend, I've tried to make sense of what I see. I try to tell myself "that I am in control", that I can find understanding where there was none, but no. None of that.
Laying in my couch, I feel myself standing, walking, and no matter how much I say "I'm on the couch", it doesn't make sense. Suddenly, the real world becomes a dream. When you wake up, sometimes you struggle to remember what it is you dreamnt, my reality becomes much the same, where it all felt like it was so far away and false. It vanishes under you.
I don't know if that's the kind of hallucination you want, be careful what you wish for, I assure you. If you're dead set on doing this, and REALLY want to be lost, and doubt the words that I or other salvia (or ex salvia) users have said... with some risk prevention to the side, place yourself in a room with no sharp objects, flames, etc... be alone, and take big, big hits of salvia extract with a butane torch lighter (not a regular lighter), take the hits as you're lighting it from beginning to end. Fire should be on the plant the entire time you take it in. Keep it inhaled, only exhale when you can hold it in no longer... and good luck finding your way home.