ray_afraid said:

-I hate that soccer ball droid. How's his R2 head staying on? Looks so silly.

Magnetic power of some kind.

Again, use your imagination people! This is not Star Trek, were everything have to be explained on screen with lousy concepts. This is Star Wars, were the lousy concepts are the ones the fans should bring during discussions with their friends! Anyone have the right to not like the look of that droid. But saying that you "hate" a 3 seconds video clips of that cute little droid because you don't understand how its head stands on its body... Come on. Maybe it will be your favorite character in the end! ;)