Here is visual proof of a visible fart. 
LOL If you light a fart you can see the “stink” haha.
Usually burns with an awesome blue or orange flame. I pride myself on being a pro in this field LOL
Holy Macaroni, Batman! A DOUBLE contraction!
lieu …where are ya? Explain it sir!!
I always figured this is what the physicists were referring to when they mentioned Brownian Motion.
Yes.
http://www.mne.psu.edu/psgdl/FSSPhotoalbum/pages/FSSJDheatercopy_jpg.htm
Full-scale Schlieren fun.
I tried for a triple but just got muscle cramps…
There’s fish n chip shop quite near to where I live. They seem to fry thier food in motor oil or somesuch according to the gut chrning smell.
You can’t **see ** the stink but I’m pretty certain you could **sew a button on it ** 