In the days before contact lenses, a very nearsighted soprano was singing the title role in Tosca. For the second act, where she stabs Scarpia, the diva instructed the prop master to place a knife at a specific spot on the table so she could pick it up at the right moment to attack the baritone. Either the knife was not placed according to her instructions, or she forgot where it was supposed to be. At any rate, as the tension grew, and she needed to grab the knife, she could not find it, and in desperation grabbed the nearest long, narrow object on the table — a banana — and lunged at Scarpia, stabbing him with the fruit. After he died, she intoned “E avanti a lui tremava tutta Roma,” and threw the squashed banana down.