You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Lightening flash can cause injury by all of the following, except- and explain in detail?
Mechanism of injury in lightening burns are:-

Direct effect of high voltage current.
Heat, i.e. superheated air causing burns.
Expanded and displaced air, which acts as a blast wave.
Sledgehammer blow by compressed air pushed before the current (sledgehammer effect and blow death).