A Nadir Experience is a negatively felt Connection Experience. Nadir experiences are unpleasant moments of stress, anxiety, anger, confusion, fear, paranoia, and even psychosis caused when Consciousness descends into a Physical Unit that is unprepared, damaged, or embedded in a toxic milieu. Nadir experiences may occur spontaneously or may be "induced" when the Bodily Ego is intentionally suppressed through the use of Connection Supplements.
A nadir experience may occur spontaneously, particular after long periods of chronic stress, or it can result from temporary/careless/unprepared suppression of the Bodily Ego, mostly through the incorrect and/or misinformed use of powerful Connection Supplements.
A Nadir experience is the opposite of a Zenith Experience.
Duration and Intensity
Nadir experiences can range in intensity from mild anxieties and fears through paranoia and confusion to full blown experiences of existential despair. Profound nadir experiences are often referred to as the proverbial “dark night of the soul”.
It is important to note of nadir experiences that while many people have them, and while they do represent an outcome of authentic spiritual awakening, nadir experiences are not a necessary feature of Realization. Nadir experiences exist, but only because we are damaged by a Toxic Socialization process, and only because our societies are toxic and filled with violence, greed, poverty, pain, and anguish. Nadir experiences arise as we become aware of and confront toxicity and damage. If there is no toxicity and no damage, there is no nadir experience.
Sosteric, Mike. (RSGAS). The Rocket Scientists' Guide to Authentic Spirituality. St. Albert, Alberta: Lightning Path Press. 
Sharp, Michael Ego Explosion, Blog of Michael Sharp 
Sosteric, Mike. (SOA). The Science of Ascension: A Neurologically Grounded, Spiritually Sophisticated Theory of Mystical/Spiritual Experience. Unpublished.