When suggesting to use a bandaid for Bongo's nose, Hansueli suggests he would look like "that actor" in "that movie". He's speaking of Jack Nicholson in Roman Polanski's Chinatown (1974).
This marks as a reunion between Roman Polanski and Jerzy Skolimowski 61 years after their first script collaboration in A Faca na Água (1962), which marked as Polanski's debut as a director.
Director Roman Polanski owns a house near the shooting location in Gstaad, Switzerland, where he lives with his family most of the time.
This film marks the first time Mickey Rourke has acknowledged on camera that he is bald. Up until this point in time Rourke has relied on an array of long hair pieces to hide his baldness.
Roman Polanski was first inspired to make the film while staying at the Palace Hotel in Gstaad on New Year's Eve 1999 and observing the other guests and the anxiety being caused by the Y2K bug.