Marcus hadn't killed them all? Maybe he was slipping, oh well, now they got to the fun and his favorite part. He slid the revolver into it's holster and continued approaching, breaking into a sprint as he neared the first one, he would barrel into it, grasping at it's throat with his crushgaunt and aiming for a quick execution by tearing a chunk out.
If successful he would chuck the chunk at the next enemy.