Overexertion by a worker lifting heavy loads can be an external cause of a work accident even if safety regulations were followed.

The Supreme Court dismissed the cassation appeal filed by the employer against the lower court's recognition of a work accident. The court found that the plaintiff's back injury resulted from lifting heavy stones, which constituted an external cause despite adherence to safety norms. The decision emphasized that procedural violations alleged by the appellant did not substantially affect the final outcome of the case.