Which of the following is NOT a sign of electrical shock?

A rapid pulse can occur in various medical conditions and is not specific to electrical shock, making it a less definitive sign compared to the others listed. In cases of electrical shock, more characteristic signs include burns at the entry and exit points of the electrical current, the possibility of unconsciousness due to the effects on the nervous system, and involuntary muscle contractions as the body reacts to the electrical stimulation. These symptoms are more closely associated with electrical injuries and can provide critical clues in recognizing the condition. Therefore, while a rapid pulse may accompany electrical shock, it is not a unique or defining indicator of it.