"Oh. Huh. Interesting. I like that. Now I'm kind of curious, where it came from? I'm totally going to use that, you know. When like the Banishers are murderizing us? I'll be yelling 'Potato!' at you. Done. I'm in. It's officially A Thing. Yeah?"
Learn something new every day. He was surprised she relented, but nodded and tucked the book away. Right next to the map of the city and a rolled up poncho. A short poncho. You only buy a long poncho to wear on a motorcyle once.
"Ummm, yeah... uh, do that."
He probably would have said grab, or hang on.
A leg flipped over it, and he tapped the seat behind him.
"Just, like, hit me if we're going too fast. Or you see somewhere you want to stop."
He almost said, 'Just yell if you're falling off'... but caught himself.