The dust hadn't yet settled when Tony, looking dazed and staring around at the shimmering bubble that contained them or kept the rocks out or both, said, "So much for not setting him off." It was just by that strange blue light that he could see the gun Nick had entrusted him with some feet away, where Tony had slid it in his haste to hoist himself up from the tracks onto the platform and grab at Billy to help him do the same. In fact, he still knelt over the boy from falling with him, keeping an arm barred across his chest then a hand folded protectively over the back of his neck when they both bowed over anticipating the crush of the rocks. Tony left him with a pat on the shoulder and a breathless, "Okay?", not really the word but shaped sounds around air before crawling across the grimy floor to collect the gun. That was where he was sitting, legs sprawled and head lolled back to find some crack in their tomb and light beyond, when the station gave another explosive shiver.
The sound was muffled by the wall of rubble, so Tony didn't really understand the screeching protest of metal until suddenly the rocks that surrounded them all heaved one way. "God--!" he exclaimed, throwing himself forward with them to avoid whatever greater force came to strike them down. He would end up tucked tight against Nick's side and squinting into the yellow lamp of the front car of the subway train fallen off its tracks and through the ceiling to crunch to a stop against Billy's barrier. At least they had a bit more light.