A local man is suing the Big 5 sporting goods chain for more than $2 million for injuries he says happened when he tested an inversion table at a store in Eugene. In a suit filed in Lane County Circuit Court, Donald Walken alleges he sustained back and knee injuries when the table suddenly flipped backward. He claims the table lacked a safety chain that would have prevented it from flipping unexpectedly. This is the second lawsuit filed in Oregon this month in connection with inversion tables. Earlier, the estate of a Bend man filed suit in federal court against a maker of the tables, saying the man died after becoming trapped in the inverted position while using the table at home.