Tommy Newsom a jazz saxophonist and arranger who gained national visibility as a key member of Johnny Carson's Tonight Show band for three decades, and whom Carson nicknamed Mr. Excitement for his stone-faced demeanor and somber outfits. One night Carson turned to Newsom during his monologue and asked why he always had his hands clasped together behind his back. Newsom replied Vapor lock!, bringing down the house with laughter. Carson quipped, I'm out here busting my buns to get a laugh, with one joke after another, and you just say 'vapor lock' and crack us all up!