A few days ago I went to dry hop my second keg of zombie dist clone. It has been in the keg for a little while under just enough pressure to keep the lid sealed. So I went to put the stainless dry hopper in the keg (love that thing) and WOOOOSH. There was a beer volcano. No exaggeration, I lost about a gallon of beer in the eruption. I was not happy and said a lot of bad words.
What do yall do to prevent such things. I know I could have vented the keg a bit before doing it, but I dont think that would have helped a lot.