Three things come to mind....
AD&D...
Players walking down road, and the DM says you see a "A Taco".
It is some monster that sounded like "A Taco", so one player, not relizing the DM meant the monster, says "I pick it up and eat it.
Sadly for the player, the moster ate HIM...
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in third edition, I played a half-Orc Bard, I pleased the players and DM as I would play a pig-skin drum and would almost start bar fights by starting up the ode to say, the battle of Unbruck, where many orcs slaughtered the human and elves, look up to see who was in the tavern, say "Rought crowd" and then do something more appoperate.
Anyways, we had a gamer girl, she was playing a halfling, and in combat her first move would be to hide behind the half-orc, her boyfriend was actually getting pissed off that she was hiding behind the half-orc, and not his usual Dwarven warrior. Ended up breaking up the couple for a few days over this.

o:
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and now, in CT...
The party was hired by some settlers to scare off some male Aslans who where squatting on the planet, before the females show up and make the squatter compound full time settlement.
The party had a hotshot former marine, who insisted that the party (who was mostly made of traiders, scientists, and naval guys and gals) land the shuttle right in the main camp, and come out blazing. The PLAYERS knew it was crazy, but the charicters figured "He knows what he talking about" so they went for it.
late in session.....
The party is holed up in there shuttle, surrounded by angry kitties, the shuttle is holed and unable to take off, and the marine was taken out by the one heavy gun the Kitties had.
The party looks around, the marine was holding the rear in the retreat, and the party best weapon is with him, exposed to fire. The party has a motly collection of blades, revolvers, and compact pistols.
Suddenly, one of the guys starts to say lines from the "Charge of the light brigade" (Which was funny it itself, he was the last one you would ever expect to know it) and the other players grin, and with a shout, run out with revolvers and cutlesses.
and by god, they won, the kittens ran back to there ship after seeing there leader get holed in the head with a revolver and there heavy gun crew sliced by cutlesses.
The party used the payment on a down payment on a free traider called "Crimean Peninsula".