I remember once, as a child, I was on my way out to go to school. It was hailing pretty bad outside, but I was excited about it because it was the closest thing to snow I had seen, but my dad had a worried ass look on his face. As we ran to get into the car, a huge ass piece of hail dropped and fucked the car windshield up! Thinking back on it now, those hail chunks were large enough to kill someone. You don't know unless you have actually seen it in person.
Or on some crazy youtube vid.
http://www.youtube.com/watch?v=20oafHukA68&feature=player_detailpage
http://www.youtube.com/watch?v=DuMX9AM9BrE&feature=player_detailpage