A man was arrested at the Cannes film festival after firing a starting pistol during a live TV broadcast on the palm-lined waterfront, sending actors Christoph Waltz and Daniel Auteuil running for cover. French TV station Canal+ was interviewing Austria’s Oscar-winning Waltz and French actor Auteuil live on its nightly news show from a beach-front set before a crowd of spectators when a man fired two shots into the air.