It Looks Like A Regular Sign Until A Train Passes By. Then It Reveals A Shocking Message.

This ad certainly made an impression and raised awareness about childhood cancer in an innovative way. The company behind the campaign, Garbergs, is no stranger to viral and unique advertisements, either.

In 2011, the Swedish agency created an interactive project for the human rights organization Amnesty International. The team at Garbergs produced wallpaper for the iPhone that shows a prisoner being freed when someone uses the "slide to unlock" function on their phone.

The goal behind the ad was to snap people out of autopilot and remind them of the harsh realities that still exist in the world, oftentimes invisible to the average iPhone user.