A small SUV rammed into the back of the Nevada Surgical Center Thursday morning, smashing through two walls and injuring three people, including one person who was inside the old hospital at the time.The red Toyota RAV4 clipped the back of a white Jeep Liberty stopped at the border between the Carson Medical Complex's parking and Mountain Street before continuing over a short sign, half a curb and a foot-tall shrub, across the small parking lot behind the old hospital and two walls, according to the Carson City Sheriff's Office.The SUV stopped at the wall at the far end of …