When you go into the washroom and discover quickly that the person before you had a Huge Steaming Dump because you can taste and feel the Hot Shit Air.
I dry heaved when I used the Shitter after Jose shat his guts out. The Hot Shit Air fogged up my safety glasses.
An unexpectantly raunchy patch of foul smelling air caused by a nasty fart. A delicacy in the right setting- see dutch oven. Usually the culprit is unknown (see SBD) and most often it is caused by random crop dusting.