The plot description as found on the Kung Fury homepage: "Miami Police Department detective and martial artist Kung Fury time travels from the 1980s to World War II to kill Adolf Hitler, a.k.a. 'Kung Führer', and revenge his friend's death at the hands of the Nazi leader. An error in the time machine sends him further back to the Viking Age."
Kung Fury was crowdfunded through Kickstarter, and since its release has been such a success that a feature-length version is now in the works (or at least in the talks). Watch it and laugh — and then watch the music video to David Hasselhoff's song for the flick, True Survivor, below.