Trivia: Sylvester Stallone, actually tore a muscle in his heart while filming the training sequence in which he lifts the sleigh that everybody was sitting in. Filming had to stop for two months so doctors could make sure that he healed properly and the chances for him having a heart attack would be reduced.
Trivia: Director Jeannot Szwarc has a cameo in this movie as a cameraman during B.Z.'s hearing.