anal railgun

The result of entering an MRI machine with a metal butt plug inserted. A perfect anal railgun launches out of the subject's anus at near terminal velocity. Internal/reverse launches, also known as "misfires", usually result in explosive death or in some cases, extreme pleasure.

"I was just starting Mr. Sawatzky's MRI when he started screaming and launched an anal railgun across the room that embedded itself in the concrete wall!"

"That's crazy! I'm glad all mine are silicone..Did he survive?"
"N....wait what?"