Aru Tabibito no Nikki by Kunio Kato showes the surreal journey of a stranger, traveling on a Dali-like pig with giant legs and leading us in to an unconscious mixture of nightmare and dream.

Strange things happen to a traveller. Illustrative drawing on paper and 2d computer animation. Originally released as Shockwave Flash episodes on:
http://jp.shockwave.com/animations/tabibito/tabibito.html

Release dates for eps from:
http://ka-ko.net/aakk/special.shtml