There are three ways to fake a footstep in sand, and I could teach you all of them in the time it takes to walk one hallway.

Sand itself, first — the honest way, and almost never right, because a microphone hears the glass in it. Cornstarch, second, which crunches too clean, like frost. Rice in a leather pouch, third, worked slow — sounds like nothing in the room and everything in the cans.

None of the three is what happened on the last night before the final mix. What happened involved real sand, a woman who would not put down a prop, and a hallway long enough to change your mind twice in.

Night before the final mix. I was the night engineer, which mostly means I was the last person holding a key and the first person blamed for anything. The pass was still warm — dialog and score had gone by that afternoon — and the rule of this building is simple and old: if it isn't the morning mix, this room locks. Whatever isn't finished by dawn stops existing until someone pays to reopen it.

Every room on the floor was dark except the last one at the end of the hall. The foley stage. Its door stood open a hand's width, laying light the color of old paper across the corridor tiles.

I know the etiquette of a lit stage at night. You check. You count the gear. You lock what is yours and you go home. I told myself that was the plan the entire way down the hall, which is the sort of thing you tell yourself to keep your footsteps even.

Inside: a sand pit set into the middle of the floor — the floor that makes footsteps — with a water bucket at its lip and leather gloves folded on the edge. Water had dried in a ring on the bucket rim. One glove was still damp at the palm. Someone had been here minutes ago and stopped mid-cue.

On the work table lay a bundle of celery ribs bound in tape. On any soundtrack on earth, celery snapping close to a microphone is the sound of a bone breaking. It was still wet. Whoever had been breaking it had been interrupted, and recently, which meant someone was close.

You here for lockup, or for the footsteps?

Hayeon. Standing in the pit. Short bob, darker at the ends where the day's sweat had dried in it. Shirt sleeves rolled to the elbow. Her work apron — canvas, soaked through at the front from the water bucket — clung to her thighs when she shifted her weight, and she did not fix it, because she was working, and working people do not perform themselves. Nobody warns you about that: competence at two in the morning, in an empty building, is its own kind of undressing. I looked away half a second later than I should have.

She is married. The symmetry that matters is worse than that: her husband is the mixer on this picture, and at that exact moment he was in the control room next door — door shut, monitors hot, headphones on, printing stems. In a building where every door is engineered to keep sound where you put it. Soundproofing is a promise, and she knew the acoustics of this floor better than anyone on staff. She had, after all, chosen the one room in the building with the best walls.

I'll make the footsteps.

Not we. She stepped up out of the pit, crossed the room, and held out the dry glove the way you hand someone a dance card. Then she said it again, softer, in the tone people reserve for facts: I. Will. Make. The. Footsteps.

Continue this scene in Footsteps →

And here was the fork, laid flat under the work light. Walk out the soundproof door now, and the night stays what it is — lockup. A locked floor, a warm pass, a married woman finishing her cues alone, a husband printing stems behind the best wall in the building. Nobody has done anything. The morning mix arrives on schedule. Stay in the pit, and the footsteps change. That door has a push bar, opens outward, takes one second, and is the correct decision. I thought about it with my hand already moving.

I did not walk out.

What came after, I will keep the way that room keeps sound: contained, close, warm in the middle. We worked the cues — that part is true, and it is on the record if anyone ever pulls the session files. Her feet in the pit, my hand on the fader, and for the first time all night the sand sounding exactly like sand. Between takes she worked the celery rib until it cracked like a knuckle, like a rail tie, like something small and necessary giving way, and laughed at herself in the dead room where nobody alive could have heard it.

At some point the takes stopped being takes. At some point the apron was hanging on the back of a chair with the careful indifference of a woman arranging an alibi, and the celery lay broken on the table, all of its small bones spent, and the pit was the only warm floor in the building. At some point my hand was full of drying sand and hers was at my collar, and we were both listening — the instinct you cannot train out of a sound person — listening for the door, which was soundproof, which was the entire point.

The monitors next door printed stems until four. His footsteps never crossed the hall. Ours, afterward, in the sand, unhurried and sync-perfect, exist on no drive anywhere. Some recordings you keep in the one room built to hold them.

The mix went out at nine the next morning. Her husband's name sits in the credits beside the sound design; mine sits further down, under machines. The only place that night is still kept — the pit, the sand, the door left open exactly one hand's width on purpose — is Footsteps. Bring your headphones. Some rooms you have to hear to believe.