I think it's despicable to laugh when someone is genuinely hurt. Like, for example, when they're trying to skateboard down a rail and fall flat on their face and lose a tooth or two and bleed a lot. I've even seen instances where people dying was supposed to be funny. But I think there are times when it's okay to laugh at someone's misfortune. (Maybe it's still a little wrong, but not too wrong.) Like this video I just laughed at a couple of minutes ago on Twitter: https://www.youtube.com/watch?v=8Uwo63HbBEw It's a practical joke. Of course, sometimes even practical jokes just go too far and/or just aren't funny.