Y.T.'s mom stands up, hands to her sides, and starts walking. She walks straight out of the office. None of the other people look up. Not supposed to. Insensitive to co-workers' needs. Makes the testee feel awkward and singled out, when in fact the polygraph is just part of the whole Fed way of life. She can hear the snapping footsteps of the proctor behind her, walking two paces behind, watching, keeping her eyes on those hands so they can't be doing anything, like popping a Valium or something else that might throw off the test.
Source: wiktionary