My definition of rock and roll

When I think of rock and roll, I think of head banging music that gets your heart pumping. Rock and roll music is generally good and can get you pumped to play sports. I think that stuff like metal and blues could be considered a sub-genre of rock and roll. Rock and roll music is a driving force of the music industry and supports anarchy. People who like rebellion like rock and roll. Yay rock and roll!