The drive to the secondary facility took eleven minutes, and Barry spent every one of them running through the Chamber's final checklist in his head, even though he'd already run it a hundred times before today.
Cisco's voice stayed steady in his ear the entire way, narrating the final preparations back at STAR Labs, the crowd settling into their seats, Wells taking his position at the primary control console, Caitlin running one last biometric sweep across the containment field.
"They're locking the doors now," Cisco said. "This is actually happening. This is really actually happening."
"Stay on the line," Barry said, pulling into the facility's private entrance and killing the engine.
He moved through the building fast, past the security systems only he and Gideon had ever configured, into the lower level where the Chamber stood exactly the way he'd left it two nights ago, fully powered, fully calibrated, waiting.
"Gideon," Barry said, his voice steadier than he felt. "Status."
"All systems nominal," Gideon said. "Chamber ready for activation on your signal. Biometric containment field stable."
Barry stepped up onto the platform at the Chamber's center and felt the familiar hum of it settle around him, the low, steady vibration of something built with his own hands over more than a year of careful, obsessive work.
In his ear, Cisco's voice climbed with barely contained excitement.
"Thirty seconds," Cisco said. "Barry, you should see this place right now, everybody's on their feet, cameras are rolling, this is it, man, this is actually it."
Barry closed his eyes for one long moment, and thought about everything that had led to exactly this point, every calculated risk, every quiet sacrifice, every piece of the plan built one careful step at a time toward a single, unrepeatable second he could never fully control no matter how much he'd prepared for it.
"Fifteen seconds," Cisco said.
Barry opened his eyes, looked up at the Chamber closing slowly around him, and felt his own heartbeat sync, for the first time in longer than he could remember, with the countdown running in his ear.
"Ten," Cisco said. "Nine. Eight."
Somewhere miles away, deep inside a containment building surrounded by a crowd who had no idea how close they actually were to the truth, the particle accelerator's core began to glow.
The glow reached him before the sound did, a wall of white light pouring through the Chamber's outer shielding a full half second before the shockwave hit, and then the world became noise and heat and pressure all at once, too much to separate into anything he could name.
*Boom!*
The Chamber locked shut around him, biometric field flaring to life exactly the way it was designed to, and for one suspended instant Barry felt nothing at all, weightless and silent in the eye of something enormous.
Then the first wave hit, and it came for his mind before it came for anything else.
It felt like every Thinking Cap session he'd ever run compressed into a single unbearable second, the same neural pathways the device had spent over a year training, except now something vastly larger than the device was pouring directly into them, using the exact architecture Barry had built for it.
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