An eminent psychologist was called to testify in court. A severe no-nonsense professional, she sat down in the witness chair unaware that its rear legs were set precariously on the back of the raised platform. "Will you please state your name?" asked the district attorney. Tilting back in her chair, the psychologist opened her mouth to answer, but instead catapulted head-over-heels backward and landed in a stack of exhibits and recording equipment.