What is a mosquito's nature? A large man enters his flat; a mosquito in top hat with valise follows, entering through the window above door. The man goes to sleep; the mosquito lands next to him, opens the valise, and takes out a grinding wheel to sharpen his proboscis. Methodically, the mosquito gets one, two, then three drinks as the man tosses, slaps, turns, covers himself, and rubs the wounds. After a fourth drink, the mosquito is so full he can barely right himself. Still he has more. Bloated, he can only hover above the sleeping man's face. Suspense builds: can he launch? He's atop his victim's nose. He jettisons his valise. Will he now be light enough to escape?