The main text:
The movie ended. We told Grandma good night.It was a balmy summer evening, perfect for the motorcycle, Tom said I should ride home with him, we’d get the car tomorrow. He revved the engine, waiting for me to climb on. I took a step toward him, then remembered the math book on Grandma’s table. “You go,” I said. “I’ll be right behind you.”
What's the meaning of get the car here?