When actor and director Clint Eastwood spoke at the Republican National Convention earlier this week, he probably did not know he would end up creating a new twitter phenomenon -- "Eastwooding."

Eastwood gave a surprise speech, in which he addressed an "invisible" President Barack Obama, using an empty chair as his prop onstage. 

"So, Mr. President, how do you handle promises that you haveMade when you were running for election, and how do you handle them? I mean, what do you say to people?  Do you just -- you know-I know -- people were wondering -- you don't -- handle that OK.Well, I know even people in your own party were very disappointed when you didn't close Gitmo.  And I thought, well closing Gitmo -- why close that, we spent so much money on it.  But, I thought maybe as anexcuse -- what do you mean shut up?" Eastwood said.

"I think if you just step aside and Mr. Romney can kind of take over. You can maybe still use a plane," the actor went on to say.

The interesting speech and prop immediately caused a frenzy on the internet.

A twitter account "Invisible Obama," was created, and in the bio, stated that it was located "Stage left of Clint Eastwood," and that "The GOP built me." An hour after Eastwood's speech, it had 20,000 followers. 

Comedian Roseanne Barr tweeted: "clint eastwood is CRAY."Twitter users immediately began to post pictures of empty chairs, along with the caption, "#Eastwooding."

Even President Obama joined in the craze, as he tweeted a photo of himself from his official account @BarackObama.

In the picture, the President is sitting in his own chair with the caption, "This seat's taken."