For a second Jack tilted his head quizzically at her, before taking the pad. He could not be sure whether she was Deaf (with a capital D, not a lowercase), or possibly having a Silence Protest. The latter being something he was familiar with, his sister having done it multiple times to protest something or another.
The pen carefully held in his right hand, he scrolled out a quick reply. "Hi, I'm Jack. Very clumsy and I'm sorry about knocking into your table." The brown haired man was still sheepishly grinning, as he handed the pad back.