https://www.erowid.org/experiences/exp.php?ID=26033
https://www.erowid.org/experiences/exp.php?ID=31722 (Nitrous Oxide) https://www.erowid.org/experiences/exp.php?ID=17787 (Mushrooms) https://www.erowid.org/experiences/exp.php?ID=104336 (Ibogaine) https://www.erowid.org/experiences/exp.php?ID=96838 (Methoxetamine) https://www.erowid.org/experiences/exp.php?ID=68367 (Sensory Deprivation)
https://www.erowid.org/experiences/exp.php?ID=68111