1. In the film, when Sean Justin Penn tries to buy a ticket at the bus station, standing behind him is a cameo by Liv Tyler .
2. Oliver Stone once said that the film was inspired by a story he saw in a homeless man in the early 1980s.
3. After Joaquin Rafael Bottom sang for the film, it was not until 2005 that he sang another film, "No One Goes Forward".
4. Sean Justin Penn initially rejected Bobby's role due to schedule conflicts, and the film crew decided to let Bill Paxton replace him. But Bill Paxton decided not to star one week before the filming started. Fortunately, at this time Sean Justin Penn had time to participate in the filming.
5. When Bobby and Grace are conspiring through the phone, the staff can be seen from the reflection of the telephone receiver; at the end of the film, when Grace’s eyes are close-up, the staff and the camera other than Sean Penn can be seen from the reflection of the eyes .
