Anthony Hopkins had a brush with death during shooting in Alberta, Canada. During filming he was taking painkillers for a neck problem. He fell in a river, and didn't feel how cold he was becoming until he began to suffer from hypothermia. He had to be rushed to hospital to be treated.
"Bookworm" was considered as a title for this film, other titles considered and ultimately rejected were; "Wild"; "Wilder"; "The Wild"; "Into the Wild"; "Wilderness Now"; "Deadhunt"; "Deadfall"; "Edge"; "On the Edge"; "Bloody Betrayal" and "The Bear Roared".
This film inspired a highly successful TV reality show of the same name in Brazil, where participants were selected from normal people, including executives, graduates and clerks, left in a wild and deserted area of Brazilian landscape and had to survive using techniques similar to the ones mentioned by Anthony Hopkins's character.
After reaching Jack Hawk's empty cabin, and after convincing Morse (Anthony Hopkins) to fly further to Big Bass Lake in search of Hawk, Green (Alec Baldwin) exclaims elatedly, "There's the spirit that beat the Japanese!" Alec Baldwin eventually went on to play Lt. Col. James Doolittle, who planned and led the counter-strike against the Japanese in Pearl Harbor (2001).