FrogReaver
As long as i get to be the frog
I have to disagree here. The check was not to persuade him not to kill them, so the attempt on their lives is not part of failure or success of the persuasion attempt at all. The check was to build the passage, which he did. That's a success. The attempt is the bad guy doing what he does and protecting himself in bad ways, moving the story further along. That's a good thing.
Party comes across an unknown tribe. The bard decides to impress them with his playing the lute. He rolls a 20 on his performance check. They immediately try to kill him. Unknown to the party is that this tribe sacrificies anyone that can play an instrument well to the gods...
You know, I guess I can see that scenario. I still dislike that succeeding on your check directly results in bad things happening to you.