One of the most entertaining flash diversions we've seen in a long time has to be Super Mario Crossover. It's the one where you can play through Super Mario Bros. but as Samus Aran or Simon Belmont or one of a bunch of other classic NES characters. Super neat, the game is, and it's about to get neater still.
Watch the video above and you can see what happens when you get some ninja all up in your business. Everything about this is awesome except for the ambiguous, "coming soon," at the end. Ambiguity makes me highly uncomfortable but ninjas make me happy. I am conflicted.