Nell stepped back and lowered the point of the knife. The man was wearing 
the uniform of a building services worker and had obviously been yanked away 
from whatever he had been doing and put in charge of the elevator's controls. 
The man whom Nell had just killed, the one in the black leather skullcap, was 
some sort of low-level official in the rebellion and could not be expected to 
demean himself by punching the buttons himself.