In Maryland Heights, St. Louis, baseball-sized hail fell on April 28, 2012 breaking car windows and ruining all sorts of stuff in the neighborhood. WIRED breaks down the science behind big hail like this and finds that to some degree, even though this hail is baseball-sized, it isn’t the same as a baseball falling from the sky. But don’t be fooled, it’s still going to hurt and cause lots of destruction.