There was also the time in Traveller where I was the navigator for our ship, and rolled snake-eyes on the Astrogation check our very first time out. Two other players claimed they'd have checked my maths so the GM let them make checks, and neither got a success, so he ruled that they hadn't spotted the error in my calculations.
So, we mis-jumped and wound up in a distant star system without enough fuel to make it to civilisation, and had to investigate a creepy centuries-old derelict spaceship to recover the fuel we needed.
This was a fairly noisy table - our characters weren't wonderfully well matched for a trading crew, so people tended to start discussing in ones and twos where to go and what to do next, often talking over each other - so when the GM asked who was going to be making the astrogation check to jump out of system, I was the only one who noticed.
I waited a good 30 seconds, giving anyone else who wanted to the opportunity to jump in, but with no other responses, and seeing the chance for my character to redeem himself, I reached for the dice with a comment along the lines of "well, I can't do any worse than last time". Yes, I really should know better than that.
Somehow, where the GM's repeated requests for attention had failed to penetrate the other players' heated discussions, the words "Wow, what are the chances? Snake-eyes again!" did the trick perfectly.
There was much protestation that there's no way they'd have let me plot another jump after last time, which the GM dismissed on the grounds that he'd asked if anyone wanted to do it and nobody else had replied. He did allow everyone with any astrogation skill to check my character's maths this time, and again, while I was the only one to roll snake-eyes, nobody else actually rolled a success.
So we were off again into uncharted territory, and this time it wasn't just our fuel running low, we were critically low on supplies too.
This time, fortunately, there was a habitable world in-system, an Earth-like planet with oceans for us to syphon hydrogen fuel from, and an early-20th-century equivalent civilisation.
After fuelling up, we made our way to some farmland in a remote area and attempted to negotiate peacefully with the locals for some food, but they reacted with extreme hostility and were killed in the ensuing gunfight. We grabbed what stocks of meat we could, as well as a large quantity of the harvest from the strange purple-leafed crop they were growing, and headed home.
It wasn't until we were well on our way out (fortunately this time with a decent astrogation roll) that we discovered why that farm was so remote, and so well defended. It turned out that the plants they'd been growing there were of a somewhat medicinal, illicit nature, so when we finally popped back into normal space in a friendly system we were extremely well fed, but also stoned out of our minds on alien weed.