WARNING: The following article contains major spoilers for Avengers: Infinity War, in theaters now.

Avengers: Infinity War promised a lot of heartbreaking moments, and it certainly lived up to expectations. With Thanos finally getting his hands on all six Infinity Stones, he eliminated half of life in the universe, and in so doing, many of Marvel's most beloved heroes were wiped from existence.

One of the more surprising deaths was that of Tom Holland's Spider-Man, who withered away in a very tear-jerking scene in the arms of Tony Stark. However, directors Joe and Anthony Russo indicate that, despite reports that the scene was improvised, everything was in the script, which left room for Holland to offer his own interpretation.

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"As Spider-Man’s death was deemed the most emotional, his demise was saved for last," Joe Russo said Wednesday at an event held at the Smithsonian Institution in Washington, D.C. But the directors had suggested for Holland improvise more with Robert Downey Jr. to make the death seem like more than a plot device.

That led to Holland to develop the line, “I don’t want to go,” as faded away in the arms of Iron Man, who's become a father-figure to him in the Marvel Cinematic Universe. With the Spider-Man: Homecoming sequel set to occur right after the ending of Avengers 4, fans are eager to see just how the wall-crawler returns from the afterlife.

Check back later for CBR's full report of the Russo brothers' Smithsonian presentation.

Directed by Joe and Anthony Russo, Marvel’s Avengers: Infinity War stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie.