Is it wrong to laugh at peoples misfortune?

Not things like losing a loved one, death or being diagnosed with a disease rather getting ran over, beaten up, robbed etc. Like once my brother got beaten up real bad bust black eyes bruises bust lip oh it was too funny me and my other brother kept going into laughing fits just by looking at him. He kept punching us up but it was too much couldn't stop laughing at how messed his face and the story of how it happened.