Unfortunately, most people have only have only heard of the Four Horsemen in the Book of Revelation.
In order to further their Biblical knowledge, I want to mention the lesser-known but equally feared Four Horsewomen. See the Bible for the full version.
(a) PMS, riding a puce horse
(b) Water Retention, riding a vile light green horse
(c) Weight gain, riding a blue horse
(d) Bad Hair, riding an off-brown horse with roots showing
Agggh! I hear hoofbeats!