It's not often that you can say "Captain America rocks" -- after all, he's a straight-laced superhero who's roughly your (great-) grandparents' age. However, here it's fitting, and without an ounce of irony.

Eric Calderone (aka Erock), whom you may recognize from his 2014 rendition of the Iron Man theme, pay tribute to the Sentinel of Liberty with a metal version of Alan Silvestri's "Captain America March" from Captain America: The First Avenger -- with a little assistance from "Underoos."

"So I figured this would be appropriate for everyone coming off the Civil War weekend hangover," Calderon explains. "And you can never go wrong with Mr. Alan Silvestri. For those wondering this is the march/theme from the first movie -- Captain America March. And I tried giving a little nod to the trailer by getting in my Underoos."

(via Nerdist)