 CONT: Its clearly implied that Hank and the guys graduated from  high school in the seventies, yet when Bill runs off to join the  Army, the Quarterflash song Harden My Heart can be heard. This song  was released in 1981.  The episode "How to Fire a Rifle Without Really Trying" is about  Hank being unable to shoot. But in the episode "Luannes Saga" a  skeet trophy from 1975 can be seen on the shelf in Hanks den.