‘Napoleon Dynamite’ Teaches Jimmy Fallon How To Kill A Mammoth [Video]

Jon Heder showed up on Jimmy Fallon's show in full 'Napoleon Dynamite' mode and helped Jimmy become a man.

With the 'Napoleon Dynamite' animated show debuting on FOX next week, Heder was in classic "sweet" form.

Watch as he and Fallon go hunting for mammoths and manhood.