In fact, he was so deep into character, that not only did he embody "Fat THor" between takes and while in his trailer, he even pulled out the old guitar and tried to plumb the depths of Thor's pain.
"I didn't even know if I was ever gonna show it, right?" Hemsworth said of the clip. Thankfully, he brought it along ... and even though he was reluctant to show it, Jimmy Fallon convinced him that it was worth it and we're so glad he did.
So what song felt right for this Thor at this moment in his life? "What else would he be into but Johnny Cash, 'Hurt'?" Hemsworth said of the classic Nine Inch Nails cover. "The saddest song in the world."
"I'm a terrible singer and a terrible guitarist," Hemsworth laughed, trying to lower everyone's expectations before Fallon rolled the clip, but he really was too hard on himself. It was perfectly in character and actually would have made for a beautifully funny and poignant scene in the film.
Ever since "Thor: Ragnarok," Hemsworth has redefined Marvel's God of Thunder as a more comedic character, and it's definitely working for him. Once again, Thor got some of the best lines and moments in "Endgame," offering heroism and hilarity in equal measure.