I had a bout of hallucinations about 10 years ago. I was suffering quite badly with depression and had been on anti-depressants for years. Then came along Prozac®. The doc thought they would be good so off I went!
The three stages of my hallucinations always happened at night and in bed. I had always been asleep for a while and was awakened by the goings on. They happened in quite quick succession, perhaps over the space of two weeks, then stopped.