I hear you for sure. But many things can smell like a prank that aren't.
Besides -- and not meaning for this to sound facetious -- getting at the truth, the real truth, requires far more than our sense of smell.
Maybe with this one we'll never know. It sure is interesting, and most of all that message. If the speaker was indeed human, he spoke with a degree of wisdom and awareness I don't think any of us can deny.