Snape wasn't paying any attention to the condition of his victim; he was too busy enjoying the sound of his voice as he heaped buckets of steaming sarcasm on the hopelessly clumsy Gryffindor. It wasn't until he heard the sound of the lummox's head hitting the desk that he looked down and saw the blood. Shaking his head at the mess, he pointed at Potter and Granger; who had both finished their potions, correctly he was surprised to see, and had them escort Longbottom to the nurse.