First, watch the video clip above, then we'll tell you why - in the age of animated GIFs and the 6-second Vine videos - the animated clips featured in the clip are quite remarkable. You see, they're made from still photographs.
Joe Fellows of Make Productions explained in this The Creators Project post how he and his team created stunning "slow motion" animated shots out of still photos from the WWF, using the parallax effect:
http://www.digitalartform.com/archives/2004/11/camera_projecti_1.html