The fourth dent waited low enough to make the warning feel personal.
JJ kept herself between the dent and Ty. Blue crouched beside the receiver without crossing the danger line. Rusuf watched the gap, blade angled toward the cables, while the growl below the bridge rolled through the open space in slow pulses.
"Nobody kneels for the bridge while I am standing here," JJ said. "I want that understood before the room gets clever."
"The dent still needs a downward hit from above," Blue said. "If we hit sideways, the handle may jam before the proof strike."
Ty looked at the receiver mouth. The returning capsule sat locked below the rail, its tail ring exposed. The ring had taken the third cable home. It was thick enough to hold a tool if they could reach the dent without a hand near the gap.
"Use the capsule tail as a hinge and keep hands back," Ty said. "Put something through the ring, then strike down from back here."
Blue followed his line of sight and saw the ring.
"That creates a lever, ugly but from a standing position," she said.
"Standing ugly is our preferred safety rating around here," JJ said. "What do we have long enough for this reach?"
Rusuf turned his sword and offered the hilt first.
JJ stared at him and then at the sword.
"I am emotionally opposed to using your sword as bridge paperwork," she said. "That said, I like everyone keeping their arms."
Rusuf slid the blade through the capsule tail ring and set the flat against the fourth dent. He kept the edge turned away from the receiver housing. The sword became a long angled bar between the safe floor and the low handle.
Blue braced Marcus’s bit against the blade to keep it from slipping.
The growl climbed, and the bridge rails lifted a fraction before settling.
"Downward proof should happen on the hard push," Rusuf said. "The bridge needs force from below when the strike drives down."
"Of course downward means hitting while the floor argues upward," JJ said. "That is almost a philosophy and therefore banned."
Ty kept his good palm on the case frame and listened to the rail. Low beat. Climb. Hard push. Drop. The fourth dent pulsed at the hard push, warm through the receiver.
"Not the low beat this time because the fourth handle is different," Ty said. "Wait for the hard push under the bridge."
JJ set her sword pommel over Rusuf’s blade near the safe end.
"Tell me when the bridge growls like it means rent," she said. "I will strike the borrowed dignity out of this mechanism."
The low beat passed, and the pressure climbed under the rails.
The hard push came up from the gap.
"Now, drive the downward strike through the lever," Ty said.
JJ drove the pommel down onto Rusuf’s blade.
The blade carried the force through the capsule tail ring and into the fourth dent. The low handle folded inward. The receiver answered with a deep downward slam that pulled every bridge rail toward the dark below.
The case tried to follow the bridge downward.
Ty shoved back with his shoulder. Blue grabbed the rear guide. Rusuf kept his sword locked in the lever even as the blade flexed under the load. The growl rose into the rails and then broke apart, forced through the vent line Blue had left open.
The bridge dropped only an inch, which was enough for the proof.
Three hidden teeth rose from the far side and caught the underside of the bridge rails. Three more caught near the receiver. The rails stopped floating. The cables stopped singing. The open gap still breathed below, but the bridge had found down.
The counter turned again under the service plate.
Strike 4 appeared under the first three marks, lower and darker than the rest.
JJ lifted the pommel away and stepped back.
"There, and nobody bowed for the bridge today," she said. "The room got its downward strike without anyone kneeling for it."
Rusuf pulled his sword free from the capsule ring and checked the blade. A shallow burr marked the flat where the receiver had taken the force. He touched it once with his thumb.
"Acceptable damage across the flat of the blade," he said. "The bridge gave more than it took back today."
"Your standards for acceptable damage worry me when you say it," Blue said. "They sound like something carved over a bad infirmary."
Ty kept his hand on the case and listened.
For the first time since the gap, the rail felt steady. Not safe. The difference mattered. Safe was a promise. Steady was only a current condition, and this place treated current conditions like invitations to change.
"The bridge is holding down now under the case," Ty said. "The case wants to cross before we do."
JJ looked across the gap and studied the vents.
The three narrow rails waited in a straight line. Frost clung between them in ridges. The cables below held them level. The growl under the gap had quieted, but little bursts of air still swept across the bridge from side vents.
"Those vents are not finished being annoying after proof," JJ said. "They are pointing at the rails like they know wheels."
Blue checked the service plate as more frost melted from its lower edge.
"Sweeping arms before crossing the bridge itself begins," Blue said. "The bridge clears its rails after downward proof."
"Clears them with what kind of motion exactly?" Ty asked.
The answer came from the far side of the gap.
Flat metal arms unfolded from slots along the bridge, three on the left and three on the right. They hung above the rails like long brooms made of dull steel. Each arm had a weighted end and a hinge built to swing across the path of the case wheels.
One arm twitched, and then another followed it.
The service plate warmed under Blue’s hand and revealed the next line.
The service line read Sweeping motions before freight.
The arms tested themselves in short arcs above the rails, never crossing fully, but close enough to show the path they would take. Each weighted end paused over the place where a case wheel would pass. The bridge had proved lift and down. Now it wanted the path cleaned before freight entered.