Hasta halüsinasyonlardan sıkıntı çekiyor.
 - The patient suffers from hallucinations.
O zaman, ben korkunç halüsinasyonlar görürdüm.
 - At that time, I used to have terrifying hallucinations.
Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity. - W. A. Hammond.
This must have been the hallucination of the transcriber. - Joseph Addison.
... on a single-use basis. We have this notion of streaming, this consensus hallucination ...