A player lifts their mask mid-game to wipe paint from the lens, believing play has paused nearby. A shot from an adjacent bunker strikes them in the eye before a referee can call a stop. The incident report becomes the entire case: what the chrono log showed for that marker, whether the field's stated velocity limit was being enforced that day, and whether the referee ratio on the field matched what was on file with the carrier.
If the chrono log is current and the referee was positioned and empowered to call immediate stops, the claim narrows to a genuine accident within a properly run operation. If the log is missing, stale, or the referee ratio on the day fell short of what was represented at binding, the carrier's defense weakens considerably and the field's own representations become part of the dispute.
The lesson underwriters draw from claims like this is consistent: a rule printed on a waiver is not a control. A rule enforced by a positioned referee, with a log to prove it, is the only version of "mask discipline" that survives a claim.