Zac Efron’s ‘High School Musical 3: Senior Year’ castmates and the crew got revenge the prankster on the set of the film in Salt Lake City. “He pulls a lot of pranks, especially since the first one,” Ashley Tisdale said of Zac. “He’s the prankster.” When Zac arrived on the set with girlfriend Vanessa Hudgens, the trap was set to drench the star but avoid Baby V… But she ended up getting soaked too. Watch the clip via YouTube below.