BANG.
The sound of a heavy knock on a flimsy plastic door.
BANG. BANG.
It's loud compared to the preceding quiet.
Silence returns for several long seconds, and then...
The sound of a mobile ringtone, tinny and shrill, muffled slightly by the thin walls.
The ringtone continues to play for thirty seconds...
One minute...
Two...
After three minutes, the ringtone stops.
A displeased sigh. And the knocking resumes, more loudly than before.
BANG. BANG. BANG.
A low voice calls out, "Sav, I know you're inside!"
There's no response.
"I have to tell you something... it's important."
Again, no response.
A shuffling sound, likely the individual at the front door digging around in their bags or pockets, and then a quiet scraping, followed by several clicks.
The sound of a door squeaking open.
It remains ajar as footsteps walk inside, squeaking partly but not fully closed.