The World's Most Contagious Prank

[LipanBara]

http://www.youtube.com/watch?v=H9vztQ7Z9sQ

menguap pun boleh berjangkit...pelik :-?

 

[azdaniaga]

hehehe..jom kita cuba..

 

[adoila]

contagious yawning goes beyond mere suggestibility. Recent studies show that the phenomenon is also related to our predisposition toward empathy -- the ability to understand and connect with others' emotional states. It sounds strange, but whether or not you're susceptible to contagious yawning may actually be related to how much empathy you feel for others.
http://science.howstuffworks.com/life/contagious-yawn.htm