Pet peeve film trope: indicating that someone/some system is intelligent by having them give a measurement to umpteen decimal places.
So, you've determined how far away someone is to the nearest micrometre. Does that actually have any meaning for a standard-issue squishy human 50cm in diameter and no precisely defined point at this end?
(then I get distracted working out whether it would be more meaningful to measure to the nearest point on the person or to their centre of mass, or what.)