Setting out from Hamburg, Germany, one day to give a concert in London, violinist Fritz Kreisler had an hour before his boat sailed. He wandered into a music shop, where the proprietor asked if he could look at the violin Kreisler was carrying. He then vanished and returned with two policemen, one of whom told the violinist, "You are under arrest."

"What for?" asked Kreisler.

"You have Fritz Kreisler's violin."

"I am Fritz Kreisler."

"You can't pull that on us. Come along to the station."

As Kreisler's boat was sailing soon, there was no time for prolonged explanations. Kreisler asked for his violin and played a piece he was well known for. "Now are you satisfied?" he asked. They were!