>>13243331In defense of the doubters, remember that soldiers of WW2 were regularly hopped up on raw amphetamines courtesy of their respective governments.
"The symptoms of stimulant psychosis vary depending on the drug ingested, but generally involve the symptoms of organic psychosis such as hallucinations, delusions, paranoia, and thought disorder.[2][3][4] Other symptoms may include mania, erratic behavior, and aggression."
The guys seeing "Foo Fighters" in the war, may have just been going through stimulant psychosis while flying their planes.