When he heard the screams of people burning he pushed the flames harder, Hermione cast a protego around them both although it may have been pointless, he couldn't be sure. Wands caught fire quicker than humans did and Draco aimed firstly a wall of flames at the people barraging the door and then secondly, he tossed thousands of embers to the wands aimed directly at his chest. When smoke choked the air from their lungs he breathed another violent wall of fiendfyre in the shape of a snake, slicing its way through the crowd to take out anyone who didn't turn and run the other way.