When Tango and Cash escape from the prison, Cash turns to Tango and asks if he stopped "for coffee and a Danish." Tango (Sylvester Stallone) says, "I hate Danish," an in-joke referring to his recent divorce from Danish actress Brigitte Nielsen.
The glasses worn by Sylvester Stallone for the early parts of the film are his own and not just a fake prop (he usually wears contact lenses in his films). If you look closely, the glasses indicates he's quite near-sighted on one eye but not so on the other.
During the scene where the back of the SUV catches on fire, when filming was over, the fire wouldn't go out, and actors Kurt Russell and Sylvester Stallone were caught in a cross draft. Stallone was so close to the fire that his hair was singed in places.
Director Andrey Konchalovskiy was replaced towards the end of principal photography by Albert Magnoli. In his book of memoirs, Konchalovsky says that the reason he was fired was because he wanted to give the film a more serious tone than the producers wanted, and as such, his relationship with producer Jon Peters became untenable. Konchalovsky however has nothing but praise for Sylvester Stallone, who he states was a constant voice of reason on the set.
When Brion James was originally hired to play Requin, it was a very small role with only two lines. In an effort to give the character something that would make him stand out, James decided to speak in a cockney accent. Sylvester Stallone loved it, and rewrote the script to give Requin a much bigger role.
The production was beset with problems from its very inception. Firstly, the intended star, Patrick Swayze dropped out, then principal photography began without a completed script. As mentioned above, Sylvester Stallone had the original director of photography, Barry Sonnenfeld fired. Then, the director, Andrey Konchalovskiy was fired by producer Jon Peters. The film ultimately went $20 million over-budget and had to be completely reedited by Stuart Baird prior to its release.
The climatic battle in the quarry was shot in a real quarry east of downtown LA, in Irwindale. Every shot in the sequence was shot with a minimum of 11 cameras, as some of the setups were so dangerous, the stunt team were only allowed to do it once.
The theatrical trailer shows some alternate and deleted scenes; alternate cut of the shower scene between Tango and Cash, deleted or alternate fight scene between Cash and the Chinese assassin during which Cash says "I hate you karate guys", and a deleted scene in which Tango is reading the newspapers and then pulling out Spas 12 shotgun at someone and shooting at some car with it.
A total of four different people directed Tango & Cash; Original director Andrei Konchalovsky who was fired after about three months of filming by producer Jon Peters and Stallone after movie went over budget and schedule (but not by his fault), executive producer Peter MacDonald who was also second unit director then took over directing on the movie for some time (A year earlier MacDonald had to step in as a director for Stallone's previous movie Rambo 3 after original director was fired by Stallone), then Albert Magnoli was hired as new director to finish the movie (But even after principal photography was finished he caused two more weeks of further delays after he decided to re-shot some parts of the movie), and Sylvester Stallone was also directing the movie behind the scenes (Something he was known for specially during the 80's). None of them however had any control over the editing of the movie. Instead Warner Bros. hired expert editor Stuart Baird to re-edit the movie after they expressed strong dislike for initial rough cut. Baird hired another editor Hubert de La Bouillerie to help out when Warner Bros. kept complaining on every different cut of the movie that was edited, which almost caused for release date to be pushed way further than planned. In the end, movie was finally approved for theatrical release by Warner Bros. and it ended up being shipped to theaters only a week after its original release date as "wet prints" - an industry term meaning that movie was just barely completed before its release date.