On Friday a new Public Art Fund-organized group show opened at MetroTech Center in downtown Brooklyn, which will remain open through September of next year. Titled Trapdoor, the outdoor installation "features new commissions by Ethan Breckenridge, Martha Friedman and Sara Greenberger Rafferty, and recent works by Francis Cape. By using or making reference to recognizable objects whose properties are exaggerated or altered in one way or another, these artists convey an overarching sense of transition or metamorphosis in works that appear to be changing appearance, moving, disappearing or melting. In each case, there is an element of the unexpected, of things appearing delightfully out of the ordinary; as if the viewer has passed through a portal and entered into some kind of conceptual wonderland." A delicious wonderland containing giant waffles.