We were playing an Eberron game, with all the PCs aboard an airship carrying some nobility. The airship was attacked by men on griffon-back, who landed and immediately began killing the soldiers aboard. The druid -- nevermind that we're on a fast-flying airship -- casts
Obscuring Mist.
The GM looks at him funny, notes that the speed of passage will dissipate the mist in a round, and moves on to the next character.
The druid decides that he will charge into his own (rapidly dissipating) mist, *guessing* at the location of a soldier that he can no longer see, and bullrush the man off the deck of the airship.
Needless to say, he guesses at the wrong spot. There's a griffon nearby -- the DM allows him a chance to run into the griffon instead to stop his rush. The druid rolls a 1. The druid hits the railing -- reflex save to catch the railing. He rolls a 2, then a 1 on his action point die. Feeling generous, the DM allows him a chance to catch himself after going over the railing. The druid rolls another 1. Trying to give him ONE LAST CHANCE, the DM says that he might be able to catch one of the trailing lines of the airhip, used to moor it when it docks. The druid? You guessed it, ANOTHER 1.
So the druid cast mist, charged into it, and vanished forever. It was a running joke throughout the campaign -- 'what do you suppose ever happened to that one druid fellow?' And then we'd come up with a new conspiracy theory, like he was in league with the men from the Griffons.