Screen Rant's latest video presents ten movie scenes that were especially hard to shoot. Here they're talking about scenes that don't make use of green screen or the addition of computer graphics.
For example, Christopher Nolan's Inception contains a scene that is less than a minute long, but it took three weeks to produce, for reasons they explain in the video. Like many things in life, until one learns about a process, it's easy to take that process for granted. Via Design Taxi