When a man inserts one end of a hamster tunnel into his asshole and the other end into the other male/females asshole. Then letting off a huge fart. Therefore sending his fart to the other person.

When you eat dirt for the first time and leave your family to build a shack in the woods

Shuttling is where one man places his butthole up against another mans butthole and takes a poop. that poop is transfered from the first mans butthole to the second mans butthole without ever seeing daylight.

Doing triple digits on an interstate or major highway with all four of your windows down.