A microburst is a small downdraft that moves in a way opposite of a tornado. Microbursts are found in strong thunderstorms . Within a thunderstorm there are two types of microbursts: wet microbursts and dry microbursts. They go through three stages in their life cycle: the downburst, outburst, and cushion stages. Microbursts can be particularly dangerous to aircraft, especially during landing due to the wind shear caused by its gust front. Several fatal crashes having been attributed to the phenomenon over the past several decades, and great lengths go into properly training flight crews on how to recover from a microburst/wind shear event.