I still remember the first time we heard about 'Splosion Man. It was April 1, and there were so many other joke announcements, we thought that was one of them. But no, it turned out that the story of a man who explodes his enemies into "chunks of ham and ribeyes" was real, as evidenced by its current availability on Xbox Live Arcade.
I had meant to get up early and play for a bit to provide a more comprehensive overview, but, you know how getting up early is sometimes. And hey, there's a free demo!