Type of Spiritual Experience
The following is just one example of many that shows that people who fly planes can get hallucinations. There are also instances of commercial airline pilots who have hallucinated.
A description of the experience
From the Condon report: THE NATURAL PHILOSOPHY OF FLYING SAUCERS - R. V. JONES
Based on a lecture given to the North Eastern Branch of the Institute and Society (sic) and the Newcastle Astronomical Society
The beginning of the second World War took me for a few weeks to Harrogate, where part of the Air Ministry was evacuated….. [flying saucers] appeared throughout the war and were even reported by fighter pilots who tried to intercept them, only to find that the objects were too high.
There were indeed enough such incidents for part of the Intelligence Organization to suppose that the Germans had developed a special high flying version of the Junkers 86 aircraft known as the Ju 86P, P indicating that the cabin was pressurized (an unusual step in those days) for the crew. It was further supposed that these Ju S6Ps were flying photographic reconnaissances of this country and that we were powerless to intercept them.
I doubt in fact whether any such reconnaissances were made -- certainly, and very surprisingly, there was no photographic reconnaissance of London by the Germans from 10 January 1941 until 10 September 1944 when the Me 262 jet became available.