I could be wrong in the utmost, but I believe somebody switched the blades of the lightsabres with a pretty wand and a teddy bear, so everyone in the background begin cracking up.
Myself, I'm hoping for either that chrome droid or an exclusive B3... (http://images1.wikia.nocookie.net/__cb20060717183030/starwars/images/thumb/7/7a/B3_ultra_battle_droid.JPG/250px-B3_ultra_battle_droid.JPG) How sweet would that be?