## Core Concept
Lightning flashes can cause injuries through various mechanisms, primarily involving electrical discharge. The main pathways for injury include direct strike, side flash, ground current, and blunt trauma from the shockwave generated by the lightning strike.

## Why the Correct Answer is Right
The correct answer, , involves understanding the primary mechanisms by which lightning causes injury. Direct strike, side flash, and ground current are well-documented pathways. Direct strike occurs when lightning hits a person directly. Side flash happens when lightning strikes a nearby object and then jumps to a person. Ground current, or step voltage, occurs when lightning strikes the ground and the electrical current travels through the ground, potentially harming anyone in contact with it. Blunt trauma from the shockwave is another mechanism. However, the specific mechanisms listed in the options need to be considered to understand why is the correct answer.

## Why Each Wrong Option is Incorrect
- **Option A:** Direct strike is a well-known cause of injury from lightning. When lightning directly hits a person, the electrical discharge can cause cardiac arrest, burns, and other severe injuries.
- **Option B:** Side flash is another mechanism by which people can be injured. It occurs when lightning strikes an object near a person, and the electrical discharge jumps from the object to the person.
- **Option D:** Ground current or step voltage can cause injuries as well. When lightning strikes the ground, the electrical current can travel through the ground, and if a person is in contact with the ground in two different areas (e.g., with both feet), the current can pass through their body.

## Why Option C is Correct
Given that the question asks for the exception and based on common mechanisms of lightning injury, we need to assess which option does not fit with known injury mechanisms. Typically, lightning injuries are associated with electrical effects rather than thermal effects from the flash itself being a direct cause of injury like the others.

## Clinical Pearl / High-Yield Fact
A key point to remember is that lightning can strike the same place twice. The Empire State Building, for example, is hit about 25 times per year. Understanding the various mechanisms of lightning injury can help in preventive measures.

## Correct Answer: C.