Honestly, how well do you remember every MCU movie? Unless you've spent the last few weeks binging the entire franchise in anticipation of the release of Avengers: Endgame, there's a good chance some things have faded away like Spider-Man turning to dust in Tony Stark's arms. Too soon?
Sure, you'll remember the broad strokes, but when it comes to even in the biggest movie to date and the most important for Endgame's story, the devil is very much in the detail. And those are the things we forget most easily. But more than anything, the final film in the MCU's Phase 3 needs us to remember, because there's more chance of seemingly insignificant things coming back to really mean something than ever before.
So anyway, try getting 100% on this simple-looking Infinity War quiz. It's probably not going to happen first time. So maybe you'd best learn how to manipulate the Quantum Realm's time vortexes to travel back and do it again?