Cam's height hadn't been apparent from his picture, obviously, and god was he tall! Finnick was fairly tall himself and didn't know very many men who were much taller than him, but this guy was. Such a big guy could be a threat, except that he didn't seem like he could hurt a fly.
Cam's friendly expression and puppy-dog enthusiasm made Finnick relax and let down his guard a bit. He took his hand and shook it firmly. "Hi Cam. Yeah, that's me. It's good to meet you. You're the first person I've found. Should we go check out that waterfall?"