What is a "willful" action in a personal injury action?

An injury is "willful" when "a debtor harbors 'either subjective intent to harm, or a subjective belief that harm is substantially certain.' The injury must be deliberate or intentional, 'not merely a deliberate or intentional act that leads to injury.'" Id. at 463 (internal citations omitted). An injury is "malicious" if it "involves '(1) a wrongful act, (2) done intentionally, (3) which necessarily causes injury, and (4) is done without just cause or excuse.'" Carrillo v. Su (In re Su), 290 F.3d 1140, 1146-47 (9th Cir. 2002) (internal citations omitted).