4 minutes ago, TauntaunScout said:It was never clear how Luke new about force-levitating his lightsaber in the wampa cave, either. Nothing like that was in his ANH scenes with Ben. No one freaks out about that.
I think because of the nature of the force, explained later in the same film, it was overlooked.
In the Sith lore surrounding Bane, we learn that some force skills happen naturally. It's not a far stretch to think that calling an object to yourself could be done on instinct alone as a force sensitive.