Geoff was zoning out, and hearing the sudden knock, although gentle, spooked him, causing a drop of coffee to spill onto his shirt. He peered down.
"Aw shh--"
He sat up and looked at the door, wiping his shirt with his hand. He still didn't feel like talking with anyone, but it seemed pretending to be out did no good in this place.
"Uh, who is it?" he asked aloud to be heard through the door.