WHILE TRYING TO LIFT AN ELECTRIC JACK HAMMER UP ON AN ELEVATED SLAB, HE SLIPPED ON A SNOW COVERED INSULATING BLANKET. HE FELL FORWARD & HIT HIS CHEST ON A PIECE OF REBAR STICKING OUT OF THE CONCRETE. THE REBAR HAD BEEN EXPOSED WHILE REMOVING THE CURB. THIS CAUSED A PUNCTURE WOUND.