This is occurs when one executes a particularly violent shart or a series of particularly violent sharts, causing one to feel like one's rectum has ceased to become and internal organ in order to become an external organ.

The violence of the shart recquired for this phenominen to occur is such that they occur very rarely and even then only in the highest circle of Shartisans.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.