Frederick visits Frasier in Seattle, and the family is shocked to see him going through a 'Goth' phase. The family talks about the rebellious phase of a child's life, and Niles is stung to hear Martin say that he was always one of the good kids. He decides to rebel by consuming a pot brownie supplied by Roz, but hijinks ensue when Martin eats it.
As a word, "bakutan" (commonly translated as "explosive birth") does not exist in Japanese, but its two kanji are abbreviations of the Japanese words "bakuhatsuteki" (explosive) and "tanjou" (birth). "Bakutan" is a pun of "bakudan" which means "bomb" in Japanese.