Bruce considers for a moment, the water having helped his thought processes to kick in again. "Cosmic radiation I'm not familiar with. I have to look into it. There was a scientist working with cosmic radiation I believe...man named Richards. I could probably look up some of his work and get back to you on that."
Bruce shook his head no, he didn't mind being driven at all. Being the Hulk always wiped him out physically, he was probably going to get back to the mansion and either sleep or eat, whichever he could manage first. He manages to crack a small joke, "I only have problems with cars if they started it."