

The Millfield footbridge had been making worrying noises for a week before it finally gave up.
Priya was halfway across it when she heard the first groan from somewhere deep in the metal framework below her feet. She stopped walking and looked down. Through the grating she could see the river, brown and fast after three days of rain.
Then the groan became a crack and the whole left side of the bridge dropped six inches.
Priya grabbed the railing. The railing tilted with her. Behind her, a boy she had never seen before stumbled and dropped his skateboard, which skidded off the edge and vanished into the river below. Ahead of her, two other kids she did not know were clutching each other as the bridge lurched again.
"Everybody off!" the boy behind her shouted. He had already turned and was running back the way they had come. "Move! Now!"
But the left side of the bridge lurched downward again and the angle was suddenly too steep to run up. Priya's trainers slipped on the tilted grating. She grabbed a vertical bar with both hands and held on.
"I cannot get up!" she shouted back.
The boy stopped. He looked at the tilting bridge, then at her, then back at the bank. His jaw tightened. Then he turned around and came back.
He crouched low, using his hands on the grating, and made it to her in about four seconds. He grabbed her arm. "You need to let go of the bar and use me as an anchor," he said. His voice was completely steady, which Priya found both impressive and slightly irritating given that the bridge was still making sounds.
"Who are you?" she demanded.
"Someone trying to help," he said. "Can we do the introductions after?"
She let go of the bar and grabbed his arm instead, and together they scrambled up the tilting slope of the bridge toward the bank. Behind them, another crack echoed through the framework. The two kids at the far end, a girl in a yellow coat and a smaller boy with enormous glasses, were still frozen at the highest point of the bridge, holding the far railing.
"They are still on it," Priya said.
The boy looked. Something crossed his face. "Stay here," he said.
"You are going back?"
But he was already going back.
Priya watched from the bank with her heart hammering as he made his way across the increasingly diagonal bridge to the two frozen kids. She watched him say something to them. She watched the girl in the yellow coat shake her head. She watched him take the smaller boy's hand and start moving.
Then the bridge made a sound like a gunshot and the whole right side buckled.
What happened next took about two seconds and Priya would spend a long time afterward trying to describe it accurately and failing.
The girl in the yellow coat grabbed the collapsing railing with both hands and the railing stopped moving. Not slowed down. Stopped. The girl's arms were shaking with the effort and her feet were braced against the grating and the entire right side of the bridge hung suspended in midair, held by a twelve-year-old in a yellow coat.
The boy dragged the kid with the glasses off the bridge in the four seconds that bought them. The moment they hit the bank the girl let go and the bridge collapsed completely into the river with an enormous splash.
The four of them stood on the bank breathing hard.
The boy with the glasses looked at the girl in the yellow coat. "How did you do that?" he whispered.
She was staring at her own hands. "I have absolutely no idea," she said.