Have you ever experienced stage fright? Perhaps you've stood up to give a presentation in school or presented a new project at work, but when you tried to speak nothing came out. We've all been there. Even seasoned performers can experience performance anxiety on an ongoing basis. Sometimes, your friends and family with the best intentions say, "What's the worst that could happen"? When Luka Sulic and Stjepan Hauser, members of 2Cellos, took the stage at a rock venue to perform a musical mash up, their biggest nightmare came true in this captivating music video. Of course, this is staged, but these cello-playing Croatian virtuosos are great examples of performing under pressure.