"He would never stop," Radcliffe remembered. "Like until action had been said sometimes, he would try and make me laugh."Michael Gambon and Daniel Radcliffe in 'Harry Potter and the Half-Blood Prince' Warner Bros.While many Harry Potter fans remember Michael Gambon as the beloved Hogwarts headmaster Albus Dumbledore he portrayed in multiple films from the franchise, Daniel Radcliffe remembers the late actor for the consistent jokester he was beh…