You know those videos you and your friends used to make when you're bored? You know what we mean: sing-alongs and crazy dances to pop songs at a sleepover or after a long day at school. Well, these Swedish Marines have done just that, making a parody of "Greased Lightning" while on a break from more pressing matters. Watch the video below!

(Screencap from Ralf Uhrbom on YouTube)