There was a big scene in Avengers: Endgame that might have looked very familiar to anyone who has read comics for a long time. It turns out the reason it is so familiar is that it was pulled directly from a comic book cover of a major Marvel event series.

While Civil War and Infinity War were major event crossovers in the Marvel Universe before they became movies, the crossover event that started it all was 1984-85's Secret Wars, which was the first time Marvel tried to do an event that brought the majority of its characters together and changed the entire Marvel U.

RELATED: Avengers: Endgame Fan Puts a Human Spin on Professor Hulk

Remember the scene from Avengers: Endgame where Thanos attacked the Avengers at their headquarters? It looked like some members of the Avengers were crushed under the rubble until Hulk stood, lifting all the debris off of his teammates.

Avengers: Endgame director Joe Russo told Empire Magazine that scene came straight from the cover of Secret Wars #4, which featured Hulk lifting "one hundred and fifty billion tons" of a mountain to save the heroes.

When Empire Magazine asked Russo about the similarities, he said the Endgame moment was “one hundred percent” a reference to that comic book.

RELATED: VIDEO: These Avengers: Endgame Moments Are More Important Than You Realized

Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Mark Ruffalo as Bruce Banner, Chris Hemsworth as Thor, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Brie Larson as Captain Marvel, Paul Rudd as Ant-Man, Don Cheadle as War Machine, Karen Gillan as Nebula, Danai Gurira as Okoye and Bradley Cooper as Rocket, with Gwyneth Paltrow Pepper Potts, Jon Favreau as Happy Hogan, Benedict Wong as Wong, Tessa Thompson as Valkyrie and Josh Brolin as Thanos. The film is in theaters now.