A car plowed through a restaurant’s patio during the lunch hour Monday, injuring 10 people before it came to rest with its engine revving and its hood inside a shattered plate glass window, authorities said. Firefighters had to extricate four people from beneath the vehicle, including a boy, after the 12:30 p.m. crash at the Egg & I restaurant on Sahara Avenue, several blocks west of the Las Vegas Strip, witnesses said.