Spielberg oversaw the post-production of the movie via video link while in Poland filming Schindler’s List (1993). He later called it one of the hardest times in his life as a filmmaker: the filming of Schindler’s List took such an emotional toll on him that his enthusiasm for this movie had almost waned. He said that he needed an hour per day to muster up the energy to comment on digital dinosaurs and answer trivial questions from the special effects crew.