Odds are, you just yawned after reading the title of this post. If not, you will right… NOW:

Yaaaaaaaaawn!

The “viral” properties of a yawn prompted prankster Roman Atwood to see just how easy it is to get complete strangers to do something (namely, yawn) without them having any idea that he was even walking by, much less causing them to do anything. Watch the video and feel slightly frustrated at your inability to control your own body as you yawn along:

[youtube http://www.youtube.com/watch?v=H9vztQ7Z9sQ&w=560&h=315]

YouTube regular “Vsauce” explains the contagious properties of the yawn, explaining away our misconceptions (e.g. - yawns are not the body’s response to lack of air) and filling us in on the important little details of life (e.g. - did you know that you stretch your eardrums when you yawn?)

So enjoy, and yawn away, knowing you’ve learned a little more about yourself.