 Tom s mother discovers a marijuana joint in his room. When his parents confront him, Tom denies being a "dope fiend." Despite his dad s admonitions about the dangers of pot, one of which is "an uncontrollable feeling of hilarity," Tom still doesn t buy it, and decides to find out for himself what pot s effects are. He goes down to where the local "weedheads" hang out, and is disgusted by their sloppiness and their laziness. A couple of friendly policemen tell Tom that the reason the weedheads are like that is that pot use results in a "wholesale abandonment of goals and ambitions." While digesting this terrifying prospect, Tom is mugged by a desperate band of marijuana addicts, and finally realizes how right his parents were to try to get him to "keep off the grass!"