The stutter is patiently waited out, and Bart offers a small smile, his hands tucking behind himself to keep himself still and hopefully alleviate any annoyance from that.

"Oh, no! But I'd noticed that you might be having something of a difficult time here, and wanted to know if there was anything I could do to help. I have limited experience in biomechanical engineering, and, well, I'd hoped that maybe..." He frees a hand to gesture toward the turnkey. "If you aren't opposed to a stranger's help."