Hail is just water from the sky.
Fortunately or unfortunately, it is frozen into ice and can come slightly slushy or rock solid, and in any size. So you take your chances if you walk outside during a storm with a little paper triangular cup and your favorite flavored syrup. This warning, of course, does not apply to Godzilla.
While people always drive faster than normal when it rains to stay between the spaces between the raindrops, they drive even fast when it hails. This is made further possible by driving on top of a layer of BB-size hail. For off-roaders or other maniacs, a nice layer of hail everywhere lets anyone drive into any tree of their non-choice. Hopefully, you are Russian and have a dashcam so that you will know what happened when you come to in the hospital.