At first he debated the ride, but then when Bruce said about him helping to shop Clark thought that would be a nice idea. It would help him talk to Bruce on a personal level outside of just interview questions or on a professional level. Part of him was very curious about what the guy did beyond the things that everyone talked about. He wanted to know what Bruce was like outside of his public image.
"Okay. And thank you. Honestly. I'm likely going to drop these the whole way up to the Planet offices," Clark joked. He ducked a smile and took the presents to the car where he carefully got the door open and set everything down. He offered a thank you into the car to the driver.
Once the presents were safe, he adjusted his glasses up the bridge of his nose, fixed his jcaket and asked, "Now who are you shopping for?"