She's holding back tons of steel with the sheer force of her little personality, in that crone-ish voice, saying things like, "Back it up, buddy! No, it's reserved!"
母は何トンもの鋼を 個性の力だけで食い止めてるの そこから聞こえてくる声は こんな感じ 「下がりな！ 予約済だよ！」