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The original was posted on /r/tifu by /u/bigfatskankyho on 2026-03-12 17:03:57+00:00.
The valves we use at work(bakery/manufacturing) are known as dead man valves. They are basically designed to not allow unattended flow of whatever is in the hose. The ones we use at work are spring controlled and will snap back into place quickly if released from fully depressed.
We have an oiler system we use for oiling pans before dough balls are put on them. It has a tank and is air pressure operated, but in order to fill the tank you have to hold a yellow valve open while it dumps oil into the tank. During an hourly check yesterday I noticed that there wasn’t any oil coming out and that the tank was empty so I pressed the valve open and nothing happened. After removing the lid I noticed the valve wasn’t working.
Turns out it wasn’t clicked into place. Got it hooked back up and pumping again and while it was filling I glanced into the tank to check the level, and BOOOOOM. Handle slipped out of my hand and smacked me in the eyebrow. I walked away immediately because I knew that a little bit of blood would be coming next, and I was correct. This all happened a few feet from the front entrance to our plant and as soon as i opened the door blood started pouring from my face. I almost fainted. No shit. Ended up with gash about an inch long where my eyebrow meets the nose. After about 20 mins of pressure the bleeding mostly stopped.
TLDR; dead man valves have enough spring to hurt, so don’t put your face near them when depressed. (Duh)