Ratliff Ready Mix was on site to pour a new pad for a screen. The truck was leaning slightly to one side. A chute started to swing toward an employee. EE did not see the chute moving in their direction. The driver said ""Look Out"" but it was too late. The employee was struck in the knee by the metal chute. EE's knee cap was dislocated to the side of leg. EE was taken to hospital.