Admittedly I only JUST scraped an MSc in Environmental Remote Sensing, so I’m not a credible expert, but I don’t think sharts, (IF that was the topic, which is not the case, see above) can normally be optically detected remotely in a subway environment, at least not in the visible portion of the spectrum.
So now I’ll be on the lookout for a foreigner who speaks AAVE going around Taipei with ‘fart’ tattooed on his forehead. lil slime sounds like quite the character!
If, example for, you walk backwards as well, you’ll some funny looks get.
Coincidentally though, if you wear your pants and trousers backwards, that would seem to open a potential narrow bandwidth back channel for remote shart visualisation.
Shart visualisation is, however, something of an off-topic red herring (or any other dodgy seafood likely to be a trigger)