Callum didn't look too terribly out of place. He was in jeans and a t-shirt. That was, at least, more beach-y than slacks and a button down.
Blinking at the question, Callum gave a look up and over toward the other man. Smiling gently, he shook his head, shrugged, and looked back down toward his sketchbook, "nothing, really.. just..sketching the beach." he reached up with his free hand, not holding the pencil, to rub at the back of his neck, "like to sketch places we've visited..." And things that he saw around the carnival. As he'd mentioned to Catherine, it was sort of like a diary, but with not many words at all. It was mostly just sketches and drawings.
He glanced back over toward Thorsten's hand when it was extended to him. Moving to set his pencil down, Callum reached across to slip his hand into the other man's, offering a polite smile of his own in return. "Yeah. Yeah, I've seen you around. Nice to meet you, Thorsten. I'm Callum."