Giving a large shot of a hard alcoholic beverage to someone by way of their butt hole while they are supported upside down. This is favourable because alcohol entering the anus is absorbed into the bloodstream faster then if consumed orally. Try it with friends!
Q: Man, there's only one shot left. How am I supposed to get drunk tonight?
A: Take an alcoholic enima. Let me help you. It works every time.
doctor: "this is a routine procedure"
patient: "then why does my ass hurt so bad?"
doctor: "this is known as a flesh enima, you'll have some swelling for a few days"
During a barium enima procedure the patient can no longer hold the barium within theirselves and it explodes out of their anus and covers the xray technician in a wonderful surprise
The doctor threw up when his technician received an uncommonly high barium enima surprise in the face.