Old MACK Donald had a farm, and on this farm he had beef curtains.
There's an opium addict hiding behind the curtain holding a dagger. When you walk by, he'll jump out and stab you, take your shit and sell it for dope.
literal curtains, as well as metaphorical curtains, as in 'The curtain fell on his career when he got caught humping a loaf.'
most people in the West called the Shogun government "feudalism", but the shoguns themselves called it BAKUFU。