Compressed Air Can Cause Intestinal Injury

This may be the most odd warning sign I ever came across.

 

It reads: "Caution! When cleaning clothes on the body with compressed air, there is a risk of death due to intestinal injury."

 

Not that I doubt the message. I wonder why there was a need to put up this sign in the first place.

 

Seen at the former ironworks Völklinger Hütte.

Done