I had the pleasure of being on the receiving end of a metal coil spewing beer - about a 1/4" under some amount of pressure. I was pouring for an event and having trouble with getting only foam to start. The 'help' turned up the pressure which blew the coil where it was going into the tap inside the ice chest where this lashup was mounted. Very portable dontcha know?
I saw beer spewing out from under the lid and lifted it to see what was going on. Whammo - right in the kisser. Not necessarily an unpleasant experience.
Had to fight it back onto the tap for a few moments. No way to go change clothes or wash so I poured beer for about 2.5 hours that way. Fortunately it was a very hot day and I dried out fast. Just prayed when I drove home I wasn't stopped for any reason by a policeman. Oh! the 'splainin' to be done.