Stop, throw hands up in exasperation, look distinctly annoyed. Let hand drift Conveniently close to a concealed dagger. Do whatever check is necessary to see if I can get away unnoticed with using the dagger to damage the harnesses, even slightly.
"I already inspected them, fool. You're wasting everyone's valuable time." *belt him in the face with a harness and walk past calmly, completely disregarding his input and looking distinctly annoyed*. (making a bit of a scene on purpose)