Only the second half of the headline is true, but it is every bit as uncommon as the first.
The case is being heard today in a Baden-Baden court of a man who punched a concertgoer in the face.
Details are skimpy, but it is reported that a ticket holder at the Festpielhaus rose during the encores and began clapping rhythmically. The man behind him asked him to sit down.
Words were exchanged, then blows. The man behind took one in the face.
Be careful out there.