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Ron Palillo, Horshack of 'Kotter' fame, dies at 63; reactions

That "Ooh! Ooh ooh!" That Horshack laugh. When Ron Palillo died Tuesday morning at his home in Palm Beach Gardens, Fla., another little nugget of '70s pop culture died with him. Palillo, best known for playing Arnold Horshak in "Welcome Back, Kotter," which ran from 1975 to 1979, died suddenly around 4:30 a.m. EDT, according to the  Palm Beach Post, which said he had not been ill. The actor had been teaching acting for film and camera for three years at a charter school for the arts. "These were 13-, 14-year-old kids [he was teaching], and they didn’t know 'Welcome Back, Kotter,'" Greg Hauptner, founder and CEO of G-Star Academy,...