LEGO Universe: Play, Build and Battle Trailers

The three E3 trailers for LEGO Universe each highlight a different aspect of the block-based MMO world: playing, building and battling.
What they don’t, or perhaps can’t, explain is why the real little LEGO people always keep smiling when you pull their heads off? Frankly, I find it a bit weird.
Ponder that question as you watch the videos.