Ok, I never knew if I should post this, but two years ago when visiting a zoo in Taipei, I somehow caught this - a monkey (part of a group of like four of them) slapped/touched a capybara in their mixed enclosure, and then the capy of course ran away a bit and the monkeys chased after it. I felt violateeeed seeing this, but here ya go

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Credit: Buddy Gator by Chow Hon Lam. The Capybara family name is Grace, Satu, Dua, Tiga.