Actually the capacity of the brakes/tires assy being able to hold the aircraft in position at high thrust is proportional to the load of the aircraft, the capacity of the brakes, and the state of the surface (and some other minute parameters).
On a normal static TOGA thrust takeoff, on a non contaminated runway, most aircraft are heavy, thereby the friction is high enough for said plane not to move during the application of thrust.
Same aircraft loaded only with some fuel will happily move forward, even with the brakes set. I well remember our empty A300-600 moving forward (actually it set up a kind of hicupped motion) when we had to do a full thrust engines run-up a few years ago
And yet to find a
seriously over powered machine
in the civilian world...
Best wishes to the injured
live 2 fly 2 live