WARNING: Mild spoilers ahead.

Everyone is worried about which of their favorite Marvel characters are going to die in "Avengers: Endgame," but there may be another urgent issue: When to go to the bathroom. At 3 hours and 58 seconds, "Endgame" is the longest movie in the Marvel Cinematic Universe's history. And chances are, you won't make it through without needing to run to the bathroom.

"Endgame" is wrapping up the last 11 years of Marvel history over 22 MCU movies, which Marvel is now referring to as The Infinity Saga. In order to not miss any key plot points, there are strategic moments throughout the film that are perfect for a super quick bathroom break.

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Some international showings have intermissions

If you're lucky enough to live in certain European countries, however, there may be an intermission halfway through the movie. Some Twitter users who have attended international screenings in countries like Israel and Italy have experienced the breaks firsthand, but they definitely will not be present in the United States.

ITALY IS VERY CIVILIZED pic.twitter.com/p3eaktAwF7 — Gillian Smith Chang (@gillyheartsyou) April 24, 2019

Theater just paused Endgame halfway through for intermission. What the ??? pic.twitter.com/7ugUBmVdg9 — Elazar Abrahams (@Elazarta) April 25, 2019

But there's one rule you absolutely cannot break — if you are already past the two-hour mark: do not leave. It's too late. Before the two-hour mark, however, you have a few options.

"Avengers: Endgame" bathroom break opportunities

Break #1: San Francisco title slate

This scene comes about 30 minutes into the film, and it focuses on Ant-Man. It's mostly just Scott piecing together plot points that the audience is already familiar with, so you won't miss much if you leave now. But it's still early and you'll have over two hours after you return

Break #2: When they eat lunch

At just over an hour into the film, a few of the "Avengers: Endgame" characters eat lunch during a somewhat silly scene. While the scene does advance the story, it doesn't hurt any major plot points to miss it. These 15 minutes are likely the best window of time during the entire movie to run to the bathroom.

Break #3: Conversation between Tony and Pepper

This is a character-building moment for Tony Stark and Pepper Potts, so it's not your best moment if you're a big fan of the couple. At the same time, it's not a super important scene for the movie as a whole, so it may be a good opportunity. This scene also takes place a little over an hour into the movie. While not crucial to the plot, it is a touching scene between the two.

Break #4: New Jersey title slate

This is your last chance. After this scene, there are no — we repeat, no — good times to take a bathroom break. It's mostly filled with nostalgia, so it's an easy one to piece together if you miss a couple of minutes.

Point of no return

The intense final hour of the movie is critically important. About two hours in, the Avengers all assemble to begin to execute the plan they've been building to all movie. When the main characters re-assemble after their "mission" to fulfil their "plan," you will have hit the point of no return.

If you haven't gone at that point, you will really want to hold it. The action comes non-stop over the next 40 minutes or so. If you can just make it to the credits from this point, you're good because "Avengers: Endgame" doesn't have a post-credits scene. But you may want to stick around for that easter egg sound after all the credits roll by.

Or you could just take Paul Rudd's advice, and use your popcorn bucket so you don't have to miss a moment.

The best time to go pee during 'Avengers: Endgame'? Paul Rudd says just pee in your popcorn tub and move on... pic.twitter.com/GUV7aGsf40 — Lights, Camera, Pod (@LightsCameraPod) April 9, 2019

"Avengers: Endgame" reviews

If you can't get enough of "Avengers: Endgame" before you get your chance to see it, there are plenty of reviews to be had online. The L.A. premiere was Monday and there were many spoiler-free tweets to be had. Our sister sites GameSpot and CNET both have reviews available as well.