Rickenbacker Guitars had a full category dedicated to them on today's Jeopardy program. It was the first category of the Jeopardy round. Of course, it was the last category selected by the contestants. All of the clues were correctly answered. Spoiler Alert: If you are a fan of Jeopardy and do not want to know either the clues or the answers, read no further. The clues were as follows: $100 - Rickenbacker began a music revolution with the prototype of the first truly electric guitar [Kelly holding guitar], the Frying Pan. It was made of solid wood, so it could be loudly amplified without producing this screeching [screeching noise], also known as the Larson Effect. $200 - Rickenbacker changed the sound of the 1960s when it gave the second ever Model 360 12-string [Kelly holding guitar] to George Harrison who used it for the opening chord [chord played] of the theme song of this 1964 movie. $300 - Heartbreaker Mike Campbell uses a Model 620 12-string for that ringing tone fans love as he backs up this fellow Floridian. $400 - A Model 1998 was the victim when this musician [insert photo], who later got his own limited edition model, did his first onstage guitar smashing in London, in 1964. $500 - Rickenbacker bass guitars have provided the thunder for generations of rock bands. The bass here [Kelly holding bass] was played by John Paul Jones [insert band photo] on this band's first US tour in 1969. The answers were: $100 - What is Feedback? $200 - What is A Hard Day's Night? $300 - Who is Tom Petty? $400 - Who is Pete Townsend? $500 - Who is Led Zeppelin?