WWI German soldier with a cat on his head...

... wearing a nightshirt, armed with a bayonet, standing in front of a latrine.

Click for bigger if that will help you figure it out.  Found at drakegoodman's Flickr photostream, via I've Had Dreams Like That, via Uncertain Times.

p.s. sorry about the grammar here, which makes it sound like the cat is wearing the nightshirt and is armed with the bayonet...