This debuts Walter's hat, which further expands his new alias, Heisenberg.
This has Hank's second mention of his biggest crush, singer Shania Twain, following the famous "tuggy" line in Cancer Man (2008).
This is directed by Tim Hunter, no stranger to drug culture in cult cinema; he co-wrote Over the Edge (1979) and directed River's Edge (1986). In Over the Edge (1979), there's also a scene where the police and parents have a nighttime meeting inside the school.