This is a 3-phase 208Y/120 setup in a 12-wide trailer, derived from two transformers, each serving a portion of the building. I suspect (but haven't verified) that the neutral bar is bonded to ground in each panel, and all panels grounded to the structural steel, which would allow the fault current to pass through the other circuits in nearby panels as a voltage spike. Several of these circuits are already overloaded (12 computers on a 20A circuit+ peripherals) and wouldn't take much to trip, regardless of how the surve/spike/etc actually got to them.
If the neutrals are bonded properly at a single point, a ground fault couldn't have impacted them in this way.
