The Watermelon Brain is a delicately carved fruit made by Instructables user, connormashman. To create this masterpiece, simply use a vegetable peeler to remove the green skin and then carve the brain's hemispheres. Continue to carve curved lines to recreate the organ. Stick a knife in it when completed, or some syringes of alcohol for a more party-appropriate treat.
For another freaky fruit carving, check out these edible carved skulls.