Two weeks ago I was racking my bohem dunkel out of primary into a keg through the beer out post... only problem was, it wasn't connected to the out post, but to the gas in post!
I was doing some cleanup also, and went over to check how the racking was going. Well, there was a huge amount of foam on account of dropping 2 or 3 gallons of beer a few feet to the bottom of the keg. man.... what a goof. These things always seem to happen to the beers that you expect the most from too!
After about 15 minutes of pulling, cursing, and prying, I finally got the dang QD off the post and back onto the correct post. Keg is now sitting at 35 degrees; so far, no off flavors but I'm drinking it fast just in case. Fortunately I had purged the keg with CO2 so that will help delay problems.
This is why I don't drink when I brew; the distractions of wife and kids can scramble my brain without help.