A man was impaled by a piece of wood in Brookfield yesterday.  Emergency personnel responded to Appleby Farm Road shortly after 4pm for a report of a man with a piece of wood in his leg.  The  21-year-old man had a six-inch-long, quarter-inch-round piece of wood impaled just below his knee.  The man was found in the backyard of a home and transported to Danbury Hospital.  It's unclear how the piece of wood impaled his leg.