I have told the story of our greatest role playing failure several times but it is such a wonderful story I will tell it once again.
So the GM (not me, I am innocent of this one!) is trying to bring the party together. It is a spacemaster game and my character is an insurgent against an evil empire. As I wander around the town other members of my team of dropping out of radio contact as if they are being picked off. Then I notice I am being tailed so I end up leading them to a cafe, lots of witnesses around should they try and make a move against me. Much to my surprise my tail sits down opposite me at my table. We are eyeing each other, full of distrust. I take my auto blaster out of its holster and it is aimed at this person under the table. Unknown to me the person opposite has done pretty much the same thing.
The tension builds….
A third person enters the cafe, walks up to our table and says “Hello” and the PCs all shoot each other and all roll fatal criticals. End of game.
Amazing but not in a good way, but it is a good story.