One of those damn toilets that flushes automatically, usually found in public restrooms. There's a little "eye" in the back (yes, creepy) that is supposed to sense when you get off the can so it can flush for you, just in case you are one of those doochebags who doesn't know how the little lever works. (Who ARE the people who DON'T flush???) Unfortunately, the "eye" often makes mistakes, causing the toilet to flush prematurely, thus splashing one's posterior with toilet water. Yuck.

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.