You dive under the stall door, only to find it occupied

In desperation you lunge for the door of the stall, only to find it locked. The echoing sound of a step drives you to fling yourself onto the floor and wriggle under the door. Your thick nipples scrape across the grimy tiles, and it's only as you gather your knees under you that you realize why the door was locked to begin with.

A black teen stares at you, dick in hand. He's obviously an employee of the theatre, and it's just as obvious that he was taking a masturbation break.

The two of you lock eyes, uncertain how to proceed. Your bladder and his dick both seem fit to as footsteps echo loudly on the tiles.