With one shot, Travis killed the man who was sitting on the left side chair of Ryden. When the man fell, he slumped on to the table where they placed their drinks and snack and other stuff. He even toppled the candle and caused a little fire but Ryden immediately threw a rug to put it off and to darkened the place once again.
But he was too late.
Travis saw that there were just the two of them who remained which made him feel even more angry. It wasn't just the anger towards Ryden but also towards himself. He was angry because he let down his guard which caused his wife to suffer.