The most effective marketing artfully blends a crisp message with impeccable placement (a rare combination of timing and location that hits the right audience at the right moment). Add a touch of dark humor, and you’re impossible to ignore.

Bus side ads are nothing new, but bus tops? A high-level photoblogger captured this CareerBuilder.com placement, which uses the usually unseen real estate above the bus to tremendous (if potentially offensive) effect. The concept is effortless, the targeting is spot-on, and the impact is—well, let’s let just hope the impact remains figurative.