Trippy Head Portraits

I mentioned this painting in one or two classes the other day. It's
haunting, to say the least:

http://www.ibiblio.org/wm/paint/auth/munch/munch.scream.jpg.

Here's another crazy head portrait with a similar feel, this time by
Francis Bacon:
http://members.tripod.com/~pinkfreudian/at/headvi49.html.