Need a reason to want to f*ck up a helicopter with a katana? I don't, but the guy in this Japanese Metal Gear Rising: Revengeance commercial did. Love it. Love his face. It's just slightly more funny than the other television commercial Konami released today, showing a girl using a copy machine and losing it (shown below).
Konami unintentionally beat both of these with their trailer as far as funny is concerned, though you'll have to look for it. Click this link to head to YouTube to watch the extended trailer for Revengeance, hit play, and then hit '9' on your keyboard and get ready to see the best face ever.
I cannot stop laughing.