Bright/Dark Field Lighting
Strobist info: (also see graphic in comments) I basically split the dark- and bright-field lighting concepts in half. Two strobes under that table, one directed straight back and the other off to the right, hitting two pieces of white foam core wrapped around the table about 1 ft. away. The black background is a piece of black foam core sitting on top of the table. Also using black foam core as gobos to the left and right of the subject.