Corrected entry: In the video before being chased by the bulldozer commanded by Von Beck, Indy is seen with a machine gun. You can't even equip a machine gun at this point of the game.
Continuity mistake: Very oddly, Indy's hat disappears every time you press esc to equip the pause menu.
Correction: Indy picked up the machinegun just before Von Beck arrives, you can see it lying on the crate.