freak accident

Noun

An incident, especially one that is harmful, occurring under highly unusual and unlikely circumstances.

Japanese Meaning

非常に珍しく、予期せぬ特殊な状況下で発生する有害な事故 / 想定を超える異常な条件で起こる、突発的な事故 / 通常では考えられない珍しい状況下で発生する事故

She blamed the power outage on a freak accident at the substation that disrupted the whole neighborhood.

彼女は変電所で起きた異例の事故のせいで停電が発生し、近所全体に影響が出たと非難した。

Sense（1）

An incident, especially one that is harmful, occurring under highly unusual and unlikely circumstances.

freak accidents

（ plural ）