Wik said:
We had a GM a year or so ago who would say "basically" a lot. And I mean, a LOT.
While I say "like" a lot, our GM is an "Ummmmm" kinda guy.
Among the memorable "oopsies" during games that I remember fondly would be the time he's running some module from I think it was star frontiers, adapted for a cyberpunk game, and about mid-way thru the module... after we've broken into this lab in the middle of a jungle, all the staff and guards have mysteriously died, and we've just found two NAKED teenagers wandering around the facility, and before he can get to the part where he can describe that they display "strange mental powers"... I pipe up...
ME : "So its like that episode of ST:TNG... with the lab of geneticists who created kids with augmented immune systems and mental powers...."
GM's wife who's also a player : "Oh and their enhanced systems mutated a cold into a deadly disease that only affected the staff"
Other player : "Oh yeah that was a good episode"
GM : "ummmm yeah"
GM proceeds to rapidly flip thru the module and reading stuff and realizing that yes, that's exactly what happens... and now he has to improv what to do next.
Player blunders in our group are usually to do with under-estimating the opposition the GM has prepared for us, or players outright not paying attention during critical descriptions.
My best character death was the time we intercepted an armored car on a bridge, planning to steal its contents of "plastic explosives" and totally overlooked the part where when we broke into the company wharehouse before, we found manifests for the shipments coming in and schedule detailing something else.
GM : "Ummm it says binary liquid propellant"
Me : "so its like rocket fuel or something, but as powerful as plastic explosive ?"
GM : "ummm yeah"
So of course, we need to blow something up, this will do it for us, and there's a half ton in the truck, let's steal it. So we stop the truck, get into a gunfight with the hired goons in the truck, and I have the smart idea of crawling under the truck to shoot the underside the armored car, reasoning the armor is thinner, to get to the goons inside.
Me : "I wanna work around under the truck to shoot it, like its plastic explosive so that's pretty safe to shoot into"
GM : "Ummm yeah you can do that"
Other player : "Is that safe ?!"
Me : "yeah I'm like using semi-armor piercing ammo, it should be fine"
I make my attack roll, hit, GM grabs a manual, makes some roll, mumbles "ummm its like gun cotton" to himself as he tries to find what table to use for the explosion.
His description... "you get a very close up view of the explosion as the truck explodes doing 2000 hits of damage to you"
Me : "but wouldn't an armored car like this have blow off panels in the roof or something like in case of accidents?"
GM : "Ummm you're right... so most of the explosion goes upwards, I'll halve the damage to your character and the rest of the party now gets to be wounded and not killed also, too bad, you almost set the record for most damage done to a character in any game i've run"