Louis Farese
From RockyWiki
Louis Farese is credited as the first person to talk back to the screen during The Rocky Horror Picture Show. His callback took place in 1976 at the Waverly Theater in New York City during Labor Day weekend (on September 4 or 5) when he yelled "Buy an umbrella, you cheap bitch!" to Janet Weiss during "There's A Light", and "How strange was it?" to The Criminologist's invitation "to take you on a strange journey".