Trivia: California Govenor and former action star Arnold Schwarzenegger makes a special guest appearance in this movie. When Beck first arrives at the night club, Arnold walks right by him and tells him to "have fun." Arnold had just become Govenor and knew he would not be acting for awhile so this was his way of passing the torch to someone he felt would take his place as the future of action movies.
Trivia: Beck tells one of the rebels that he thinks Muhammad Ali would win a fight against Mike Tyson. To intimidate his opponents, The Rock's father, Rocky Johnson, would often perform the "Ali shuffle" during his wrestling matches.
Trivia: The film's original title was "Helldorado." It was then changed to "Welcome to the Jungle," before being changed again to "The Rundown." It's still "Welcome to the Jungle" in Europe, possibly because "The Rundown" sounds like it refers to a car accident, whereas in the US it would be more readily associated with a bounty hunter.
Trivia: Seann William Scott's line about thunderstorms was accidentally improvised; while the reference to thunder was still there, the line itself was supposed to be different.
Trivia: The two bodyguards at Billy's house in the beginning of the movie are totally different guys than Billy's two bodyguards at the end of the movie. The reason for this is that those characters were recast and the scene was reshot. (00:09:45 - 01:33:30)
Trivia: Hatcher's brother's necklace is a gold scorpion, a nod to Dwayne Johnson's movie The Scorpion King.
Chosen answer: He wasn't searching him with the toad. The local man was attempting to sell it to him. It was simply odd timing in the movie for that to happen.