Most visible equipment/crew errors in a film

The films with the most visible equipment/crew errors, as logged by users of the website Movie Mistakes, are Speed (USA, 1994) and Pirates of the Caribbean: The Curse of the Black Pearl (USA, 2003), both of which have 43 instances of crew or filming equipment visible on screen. In most cases these are fleeting glimpses, and in many cases they're only visible in certain formats (that required slightly different framing to the original theatrical release).

In the case of Speed, which is about a police officer who tries to stop a bomb exploding on a bus, these mistakes are often the result of filming action sequences from multiple viewpoints, including many tracking helicopter shots inspired by real-world news coverage of car chases. In these wide angle shots, it is sometimes possible to see people operating large movie cameras by the side of the road, as well as the remote cameras that were attached to the bus. Additional problems were caused by the need to film some scenes through the partially reflective windows of the bus, which offered glimpses of what was behind the camera.

In Pirates of the Caribbean, many of the mistakes stemmed from the need to cram both the cast and crew onto the confined space of the ship's deck sets. In one scene, a man in a white t-shirt and cowboy hat is clearly visible behind the main characters, and in another a man holding a megaphone (thought to be director Gore Verbinski) can be seen looking on as the characters rush by. This was exacerbated by the film's historic setting, which meant that everyday modern objects (such as the electrical crew's orange fibreglass ladders, which can be seen in the background on a few occasions) stand out in a way they wouldn't in a film set in the present-day.