One of the giants (prior to Dovakhin's assault on their mammoth) has a satchel slung over his shoulder (the other does not), which swung as a separate object as he walked. Now this is either an example of advanced character animations (ie the models now have more components) or perhaps it is an item shown equipped on the body, reacting dynamically to the walking movement.

Either way, it adds alot more to the realism. I hope all equipped items react to movements dynamically.