Bonnie resurrected Klaus Mikaelson after he was daggered with a white oak stake and now, Caroline, Damon, Rebekah, Elijah gave practically giving her the lists of the good things he's done (It was a short list) and when Klaus was up he was being Klaus now playing with the dagger while the tip is pointed at Bonnie (Damon was laughing so hard) and after that? They never saw Bonnie for months of course she was gone, having a dagger pointed at you? That’s when they saw that shit was serious, Bonnie was gone, even Damon wasn't laughing for once