Floating Torso in the Fontaine de Medici

Who? What? How? Why? Last year it was a profile that was floating; this year it's a torso. Maybe next year we'll get to see some legs and arms. Can you say Mr. Potato Head? I didn't see any information about this piece but I'm assuming it's a work of art and not someone's idea of a prank. Or perhaps it's both. Modern art does have its pranksters...