What's this absence of time?

During hypnosis, time distortion takes place. Sometimes a client may feel they have been in the state for a half hour, when in fact it has only been ten minutes. Conversely, a client may feel that only about five minutes has passed, when it has actually been about twenty minutes that they were in the state. Every minute in hypnosis is equal to about fifteen minutes of good quality sleep. It is not advisable to use hypnosis for lack of sleep for more than a couple days in a row.