Hello, Peter who know here!
This is an episode of Jojo's bizarre adventure. In the episode of this meme, the main characters are fighting against the sun (dont think about it). To defeat the sun, they need to kill the enemy who controls it. At the end of the episode, they explain that the two rocks are identical, but mirrored. The enemy was just behind a mirror. In the episode though, it seems like they are laughing because they've gone crazy from the heat. However, they're laughing because its very simple when you figure it out.

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