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A man goes into a room and sits down.

Suddenly his weight increases, then eventually resumes back to normal.

After several hours - suddenly his weight decreases, then eventually resumes back to normal.

Finally when the man exits the room, his weight is the same as when he went in.

What happened?

EDIT: The answer is not "He went in an elevator".

What transpired was not an abnormal event.


marked as duplicate by JonMark Perry, generalcrispy, Alconja, boboquack, PerpetualJ Oct 16 '18 at 21:18

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  • $\begingroup$ @SteveV not the same answer, but yes I see that it is fairly similar. $\endgroup$ – obl Oct 16 '18 at 18:56
  • $\begingroup$ if it is not the same answer, I withdraw my objection, then! $\endgroup$ – SteveV Oct 16 '18 at 18:57
  • $\begingroup$ phew :) I will try to add some edits to clarify how it cannot be an elevator. $\endgroup$ – obl Oct 16 '18 at 19:00
  • $\begingroup$ He went in the loo with some food. Some food goes in, some byproduct goes out and the weight goes up and down. $\endgroup$ – rhsquared Oct 16 '18 at 20:30


he got on an airplane! And perhaps it was one of those astronaut training flights where you are weightless for a brief period of time

  • $\begingroup$ That's it! Although the decreasing weight part was supposed to reference the descent of the plane :P $\endgroup$ – obl Oct 16 '18 at 19:26

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