Most idiotic:
In a AD&D game a few years ago, one of my players was running a Drow fighter-thief. At the point this happened, the party was searching the tower of a powerful, evil wizard (forgot the actual reason now, but it doesn't matter). At one point, they find the wizard's lab, including a magic cirlce holding a deamon! Now, the deamon is trying to get the party to free him, promising riches and power and such. Smartly, most of the party decides to ignore him and move on to the next room. The drow, however, says "I want to free him." When everyone looks at him like he just grew a new head, he reply's "I'm a drow, the deamon HAS to do what I say."
Needless to say, it eneded up in a fight, with the drow dead and most of the party nearly there.
Funniest:
This seems to have become a running gag in my group, though not on purpose. I have a player that likes to run the burly, fighter-type, no matter the genre. Another player in my group usually runs whatever is needed, but in the most bizzar manor possible. For example, in a D&D game, he created a wizard, but one that hated Elves because they lived longer and had a reputation for being the best mages. Anyway, in three different campaigns now, one D&D, one Farscape and one D20 Modern, the second player has fired into hand-to-hand combat, where, of course, the fighter-type player happens to be. All three times, he critically failed the shot, and ended up hitting the fighter-type player in the back. The fighter-type has taken to doing this... "Is Player 2 around? No? Good, then I charge into combat!"
Chris
At times like these I am reminded of the immortal words of Socrates, who said "... I drank what?"