Pencil Wave

You know you used to do it. 

And you still enjoy, and even amaze others, waving around the artifact from the other era. 

“What did you learn to do with a pencil while in school?  Write.  Make it look like rubber.”
Image courtesy of http://graphjam.memebase.com/2010/05/01/funny-graphs-pencil-school/.

the rubber pen/pencil illusion

October 9, 2008