This elaborate prank in a company I was intern :
it happened in the 1970's when computers were still huge machines that most people never have had contact, something like nuclear reactors nowadays . Composed by several big modules, some were Magnetic Tape Units the size of a fridge with two big of tape spools in front, you may have seen them in old sci-fi movies. TV and movies then portrayed computers as able to do any kind of science and techno wonders.
the IT and HR guys agreed that when some job candidate looks gullible, HR dudes would instruct him to go to the Data Center so that "the computer can take an X-ray of his chest and emit a health report required for hiring."
once in the Data Center, the poor victim was instructed to stand in front of a Magnetic Tape Unit and hug it for a few seconds, holding the breath.
the computer operator then would activate a command script that would make the tape move a little, some noise, and the printer emit the "report". This contained some medical jargon to look legit and invariably the diagnosis "Lungs compromised, possible cause : excessive masturbation." Next the candidate was told to take it back to HR.
the guy who delivered it to the victims was able to keep an impassible and silent expression. Some victims would get pale, others started to argue "this computer thing is defective !" , and it happened even one case that the guy disappeared from the building in shame without being told that it was a prank, losing the job opportunity. Management then ordered to stop with the joke.