Silence. Between two people silence can be a few things. First, and probably most desirably, it could be that they are both familiar enough with one another to spend time without words or conversation. A comfortable silence.
Then there is the lead-weighted, meaning-filled, assumption-laden silence where whole narratives speed through the gambit of initiation, transformation and resolution in seconds allowing for more narratives to follow in an unyielding mental locomotive. These silences are not so comfortable.
The workshop was empty except for the freezer and power tools. Darren and Frank sat across from one another in silence.