I have my own manticore story. I figured since manticores are intelligent and able to speak, I had it shout at the party to leave before attacking. They responded by attempting diplomacy, and rolled a 30. I shrugged and it told them they could search most of the island but not the area near her nest.
On the morning of second day of the trial, my players were submitting evidence to the court. When they got to the body of the child they brought from Hergstag, I said, out of character "Hang on, did you bring a dead child to the inn overnight?" Cue a bunch of mortified laughter and requests to retcon that.
