Manual release

[Mark Zuckerberg]

A farting technique in which the flatulent person grabs one butt cheek and pulls the ass apart so that gas is expelled soundlessly, or almost soundlessly.
The manual release is sometimes accompanied by a subtly airy whooshing or hissing sound. Most [dog farts] make a similarly subtle sound, largely due to canines utter lack of butt cheeks.
According to urban legend, this is also the same sound made by the [fudge jar] when a fart comes out. For example, one would expect the [goatse mans] flatulence to behave in this manner.