 According to director Richard Donner (qv) in an interview with  "The Directors", producer Steven Spielberg (I) (qv) instructed the  cast members to act cold and distant toward Donner on the last week  of filming which puzzled him. Shortly after filming wrapped, Donner  went to his beach house in Hawaii, ran into a frenzied neighbor who  took up his entire day. When he arrived home, the entire cast was  there with Donner to celebrate with a cookout. Spielberg flew them  over to Hawaii on the promise that they not speak a word of the  surprise to Donner, which prompted them to act the way they were on  the last week of filming.