Technician Shuts Down Destabilizing Reactor Core

the prompt

Massive reactor chamber, energy core destabilizing while a technician tries to shut it down manually.
Wide shot: huge glowing core pulsing violently. 
Approach: person running across unstable platforms.
Energy surge: arcs of energy snapping unpredictably.
Near-hit: energy blast strikes just behind them. 
Platform failure: section collapses mid-run. 
Jump: barely reaching the next platform. 
Control panel: system unresponsive at first. 
Overload spike: core flares brighter, shaking entire structure. 
Manual override: forced input under pressure. 
Critical second: core reaches peak instability. 
Shutdown: energy collapses just in time.