Harold waited patiently, understanding the zone that one of a creative mind got into while working on something they liked and/or enjoyed. He himself had done that many-a-time himself, so he just waited for a point where she took too long, or she noticed him finally. When she jumped he gave a tiny grin and nodded to her before repeating what he was saying before:

"Greetings Ms. Thisa. Would it concern you at all should I sit here, and utalize the power outlet? As well, I apologize for startling you. I had decided the proper course of action would be for me to wait while you continued with your current design. And I did not wait for long, and it was of no discourtousy to me." Harold explained with a bit of mirth in his voice at her obvious passion for her work.