You could play fetch with your dog in Grand Theft Auto...or, you could use the ball to threaten people and force them to give you their money in a robbery. Because that's possible in this game, for whatever bizarre reason.
Dunno why this is possible, but either way, the latest round of myths tested by the mythbustin' DefendTheHouse is well-worth watching. It's not just about chop's ball doubling as a deadly, threatening weapon—it's fun to see characters electrocute themselves, too.
Grand Theft Auto V Mythbusters: Episode 9 [DefendTheHouse]