"Attack On Titan" (AKA Shingeki no Kyojin, or SnK) is probably the biggest deal in anime right now. Think a zombie movie combined with a military detective story set in medieval Germany. Japan's Mainichi Shimbun newspaper called it a "once-in-a-decade hit series."

"Attack On Titan" also has some of the most insane fans on the internet. They'll find any chance to slather the opening's melodramatic J-rock onto the most hilariously incongruous Youtube footages.

For comparison, this is the show's original opening: