You Guys Got This
The entire MCU collection has grossed over $22 billion since the first movie came out in 2008, with Endgame being the highest-grossing film ever. To reach such astronomical levels of financial success, the filmmakers had to put everything together like a Swiss Army wristwatch, right? Well, not exactly.

Jeff Bridges called the first Iron Man movie a $200 million student film. Thankfully, the scriptwriters got the hang of things further down the road, but in the very end, did you know that Gwyneth and RDJ adlibbed their final scene together? All they had was an outline of what the scene would be about, and they totally nailed it.