It was debatable if the enemies died on their own after a round but if you looked closely the bullet went through all 3 of them and the round ended after the kills. What a lucky shot!
Okay so buddy needed to knife coxy for a trophy and amidst the dust and the explosion, coxy panic killed buddy with a 50.cal, and without thinking, i opened fire on coxy as i thought a random killed buddy.. by the time we all knew what we'd done it was too late