Gintama Episode 21 -

A pun-based misunderstanding occurs: Gintoki wants a "senpuki" (electric fan), but the woman thinks he is asking for the "senpuki" (a counterfeit-gold machine) created by her inventor father.

The woman rewards him with a real fan, but it's broken and doesn't work. Kagura and Shinpachi assume Gintoki gambled away the money and beat him up. Key Segments Gintama Episode 21

Watch fans react to the classic comedy and chaotic confusion of the 'Senpuki' hunt: Gintama Episode 21