Time distortion is an effect that makes the passage of time feel difficult to keep track of and wildly distorted.  It is usually felt in two different forms, time dilation and time compression.  These two forms are described and documented below:
Time dilation is the feeling that time has slowed down.  This commonly occurs during intense hallucinogenic experiences and seems to stem from the fact that during an intense trip, abnormally large amounts of experience are felt in very short periods of time.   This can create the illusion that more time has passed than actually has. For example, at the end of certain experiences, one may feel that they have subjectively undergone days, weeks, months, years, or even infinite periods of time.  Time dilation is often accompanied by other coinciding effects such as spirituality enhancement,  thought loops, novelty enhancement, and internal hallucinations in a manner which may lead one into perceiving a disproportionately large number of events considering the amount of time that has actually passed in the real world. It is most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics,   dissociatives, entactogens,   and cannabinoids.
Time compression is the experience of time speeding up and passing much quicker than it usually would while sober. For example, during this state, a person may realize that an entire evening has passed them by in what feels like only a couple of hours. This commonly occurs under the influence of stimulating compounds  and seems to at least partially stem from the fact that during intense levels of stimulation, people typically become hyper-focused on activities and tasks in a manner which can allow time to pass them by without realizing it. However, the same experience can also occur on depressant compounds which induce amnesia. This occurs due to the way in which a person can literally forget everything that has happened while still experiencing the effects of the substance, thus giving the impression that they have suddenly jumped forward in time. Time compression is often accompanied by other coinciding effects such as memory suppression, focus enhancement, stimulation, and amnesia in a manner which may lead one into perceiving a disproportionately small number of events considering the amount of time that has actually passed in the real world. It is most commonly induced under the influence of heavy dosages of stimulating and/or amnesic compounds,  such as dissociatives,  entactogens, amphetamines and benzodiazepines.
Time reversal is perceiving that the events, hallucinations, and experiences that occurred around one's self within the previous several minutes to several hours are spontaneously playing backwards in a manner similar to that of a rewinding VHS tape. During this reversal, the person's cognition and train of thought typically continues to play forward in a coherent and linear manner while they watch the external environment around them and their body's physical actions play in reverse. This can either occur in real time, with 5 minutes of time reversal taking approximately 5 minutes to fully rewind, or it can occur in a manner which is sped up, with 5 minutes of time reversal taking less than a minute. It can reasonably be speculated that the experience of time reversal may potentially occur through a combination of internal hallucinations and errors in memory encoding. Time reversal is often accompanied by other coinciding effects such as internal hallucinations, thought loops, and deja vu. It is most commonly induced under the influence of extremely heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants.
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