Contagious Yawning Billboard

Cafe Pelé installed a motion-sensing billboard at Fradique Coutinho metro station in São Paulo, Brazil that displays a person yawning when someone passed by it. After a while, it made everyone in the station yawn, even me! Watch the video below.

Yawning: The World’s Most Contagious Prank

Roman Atwood set out to create the world’s most contagious prank. He made a video of himself, demonstrating the power of the yawning on complete strangers from around the world. Every time I watch this video I start yawning, Its definitely contagious. Even a dog gets in on the act, following his owners yawn at the end of the clip.