It strikes at the worst time possible. Your presentation is coming up, and your palms are getting sweaty. Public speaking is a notoriously stress-inducing exercise, and at some point, we all feel those pre-performance jitters. Earlier this month, we saw presentation anxiety at its worst when world-renowned director Michael Bay left the stage following a teleprompter malfunction at a recent press event. Other celebrities, including Barbara Streisand, Maya Angelou, and Grammy Award-winning singer Adele, have also suffered with bouts of stage fright.