Karl downed the offered beer in one go, pretty damn pleased with himself as much as Dom was outwardly projecting. But it wasn't in Karl's own nature to put it into words but whoever would go against him in the upcoming match would feel it through his actions.
Watching the exchange of words between his siblings, Karl then watched the glass shatter over Dom's shirt and wondered where Jane had gotten the agility and strength to do that.
Nevertheless, Karl took a step forward when he should've stood back, his arm ready to catch any oncoming foreign objects or appendages. While his body was ready, his vision was trained on his brother.