Thunderstorms are scary enough without a rain bomb.
In more scientific terms, the event in this video is called a microburst. These occur when a column of cold air descends rapidly through a thunderstorm and hits the ground.
The result (in an area no bigger than 2.5 square miles) is a sudden drenching and winds of up to 150 miles per hour.
Watch as one forms over Tucson, Arizona.
This time-lapsed footage shows just how a wet microburst can get. Can you imagine being right underneath that? It must have been pretty scary for those who were.