There's a Vine doing the rounds that seems to have got a lot of people in a bit of a... stink.
It's this...
Yup, a video purporting to show an unidentified man caught farting by a thermal imaging camera.
But is it all that it seems?
The less easily persuaded argue that the warm air of a fart would in fact show up white and the dark colour of the mystery cloud indicates a cold gas, possibly an aerosol.
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Also, there's the velocity. If it is a fart it's got some serious speed behind it...