Lee doesn't initially hear the door open, so when someone speaks they jump just about out of their skin, knocking over the box and nearly tripping over their own feet. "Heck!" they exclaim. (From somewhere in the back, someone snorts loudly.)
"Oh - oh, jeez. Uh, sorry. Um, I mean. Sorry, I forgot I had that open..." They sort of trail off, blinking and squinting against the poor lighting, beams of light flooded with particles of dust thick as a blanket. Nothing they dropped was breakable, just books.