Major spoilers for "The Hunger Games: Mockingjay - Part 2" lie ahead!

It's hard to believe, but if you're reading this, then "The Hunger Games" are officially over for you. (And for the entire nation of Panem, which is much, much better news.)

But in order for this monumental change to take place, Katniss Everdeen (Jennifer Lawrence) had to put an arrow through the chest of President Coin (Julianne Moore), the leader of the so-called good guys from District 13 who defeated President Snow (Donald Sutherland) using decidedly nefarious means. It was a shocking moment in both Suzanne Collins' book and Francis Lawrence's movie, as no one -- except for maybe Snow -- could have seen Katniss' very public, game-changing decision coming... Which is why, when MTV News caught up with the cast at a press day ahead of the film's release, we just had to ask how the whole thing went down, and what the mood was like on set that day.

"That was a really definitive moment," Josh Hutcherson replied. "She chooses to do something that she believes in, that she thinks is right. It's a huge moment in the books, and a huge moment in the movies. You felt it for sure on set."

"It felt pretty epic to me," Moore continued. "It was my big cape moment, and my big stunt moment, and I had a speech. That's kind of where everything comes to a crescendo, and I really enjoyed my stunt."

Part of the reason this grand finale felt so huge onscreen, of course, was the grand scale of the whole shebang -- something that, per Francis Lawrence, was not created in post.

"We were shooting that in Atlanta, in this parking lot of this abandoned factory," he said. "Jen was in the Mockingjay outfit, and we had the drummers and we had the crowds, and the drums were playing as she was marching out... it really hit me. It was definitely something that we felt on set."

"We," of course, meaning pretty much the entire, non-dead cast of the "Hunger Games" series -- except for poor Elizabeth Banks, who had to use the power of movie magic to get Effie in the scene.

"I shot that sequence on a green screen in Atlanta, Georgia, by myself," she deadpanned. "In the rain."

"The Hunger Games: Mockingjay - Part 2" is in theaters now.