The last scene when Indiana Jones’s father was shot, Sean Connery (Indy’s father who just happened to play James Bond) was shot with a Walther PPK, the side arm of the MI6 Agent. The uniforms the Nazi’s wore in the Berlin scene were in fact authentic Nazi uniforms which were recently discovered in Germany in time to be used in the film. The Rats in the sewer scene were bred specially for the movie for street rats would have been loaded with disease and thousands of mechanical rats were also thrown into the fray to give the vision of true rat mayhem. The third and supposedly last film was the only time the whole name of Indiana Jones was revealed as Henry Jones Jr. The birds Dr. Jones (Senior) scared with his umbrella to fly and stop the plane were not seagulls but pigeons with many cut-out (cardboard ones) in the sand that didn’t even move. The horse Indiana used in the movie was also used in the movie Rambo 3.
One last thing, the clothes worn by Indiana Jones in the three films that are in display in the Smithsonian’s museum of natural history, they’re to be returned when the movie needs them for the next film coming soon…very soon.