Like the monster Grendel saying in John Gardner's novel Grendel, when his arm was torn off by Boewulf--GOP lawmaker, not related to JFK--says "it was a one off"

but still a screw up. https://www.aol.com/wont-admit-mistake-gop-lawmaker-152956130.html

Grendel, by John Gardner.

https://en.wikipedia.org/wiki/Grendel_(novel)