I had a Krausen on a big barleywine that filled up a half gallon jug. That was.....until the hose clogged. I lifted the stopper and closed my eyes. There was a BOOM and when i looked it had sprayed hop and yeast all around the room. Luckily it was a spare room with harwood floors, even more lucky was that i was standing in front of my wifes wedding dress (it was in the cover thing) so it got all over my chest instead of her dress. That would have been the end of a good hobby had i been standing just a little to the right!