Butch was going to kill Vincent - no doubt. If Butch hadn’t been Butch, though, he would’ve killed Vincent the second the door opened. I mean, its not as if he was waiting to make sure who it was. He wanted to see the look on Vincent’s face ans in his eyes when he saw the gun. Vincent knows hes dead, but with that moment of waiting, it makes Vincent’s last seconds oh-so-tense.
