Kili was amazed by her answers. Even with all of his energy, his legs tired if he walked too long. Apparently wings were different. And better. 
"Well -- perhaps we should not go [i]too[/i] high," now that he was faced with the possibility of flying, he was a touch nervous. This was completely unlike him, but this experience was something that no dwarf had ever gone through before. 

Carefully, Kili moved around so that he might hold on. Kili hugged her around the neck, but not tightly. "Are you certain I'm not too heavy?" Again, he voiced his concerns. Kili didn't weigh much at all, especially considering that he was a dwarf. Unlike most, he was lithe rather than burly.