Listen to the sound clip Very sure from Flintstones Soundboard: Very sure Very sure This sound is from Flintstones Soundboard The Flintstones is one of the most successful sitcoms ever. Inspired by the 1950s live-action sitcom The Honeymooners, The Flintstones is about a working class Stone Age Man's life with his family and his next door neighbor and best friend. Go to the full soundboardwith more sound clips Search