More than four million levels have been created by the LittleBigPlanet 2 community, but few-if any-are like this: A first-person shooter apparently set inside a mecha suit.
I seriously have no idea how this was built. But the creator says it is just "a cinematic game play trailer for an upcoming project." So, bigger things are in store.
LBP2 - Massive Epic Raging Destruction [YouTube; thanks to all who tipped this]