When the fight between Starbuck and Number Six ends they fall from a ledge. When Helo helps Starbuck off of Number Six, it is seen that Number Six is impaled by a piece of rebar that sticks a good 6-10 inches from her chest. Since Starbuck landed flat on Number Six, Starbuck would have also been impaled.
A camera man in a red shirt is clearly visible behind the Arrow of Apollo display case seconds before Starbuck shoots the glass.