Dragon Form
Draco felt a wave building in his chest, and suddenly a thick wad of blood came out. After spitting this mouthful of black blood, he felt like his arteries were less congested and his blood flow was now smoother.
This was a rare heart affliction called the Shockinus Terriblus, where after suffering too many consecutive shocks, the rate of blood flow would stifle and choke the artery closest to the heart.
A normal person would have died from surprise after this much, but Draco's strong body and great vitality allowed him to cough out the offensive blood instead, leading to the current scene.
This was a legitimate medical disease, not something cooked up by a handsome, dashing, and manly fellow who is the greatest gift to this earth. Sigh, if only such a fellow could donate 0.0001% of his greatness to the world, the human race would jump to the interstellar age. (Editor's Note: The fellow in question seems to have lost his grasp on reality...)