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Lethal injection involves injecting a person with a fatal dose of drugs to cause death. The main applications of lethal injections are euthanasia and capital punishment. As a method for capital punishment, lethal injection gained popularity in the twentieth century as a form of execution meant to supplant methods – such as electrocution, hanging, firing squad, gas chamber, or decapitation – that were considered to be less humane. It is now the most common form of execution in the United States.

A tornado is a violently rotating column of air that is in contact with the base of a cumulonimbus cloud (or occasionally, a cumulus cloud) and the Earth's surface. Tornadoes come in many sizes, but they typically take the form of a visible condensation funnel whose narrow end touches the Earth and is often encircled by a cloud of debris.