What should you assume if a worker collapses without visible signs of shock?

Assuming a worker has collapsed without visible signs of shock leads to the conclusion that they may be experiencing a serious medical condition, such as electrical shock. Electrical shock can produce immediate unconsciousness or collapse without any visible external signs. In a work environment where electrical equipment is used, this situation should be treated with great urgency, as electrical injuries can be life-threatening and require immediate medical attention.

In contrast, while resting or dehydration can lead to discomfort or fainting, it typically would not result in a sudden collapse without any warning signs. Heat exhaustion, on the other hand, is characterized by symptoms such as heavy sweating and weakness, which are usually observable prior to a collapse. Therefore, given the nuanced nature of electrical injuries and the potential for rapid deterioration, the focus should be on the possibility of electrical shock, which necessitates immediate response and care.