Magic

The doodle on Google today for Harry Houdini's 137th Birthday reminded me of the time I got to do a magic trick with David Copperfield when I was 13.  After random audience members called out items for me to spray paint on a fake brick wall on stage, Mr. Copperfield pulled a large sheet of paper out of a manila envelope - that had been in plain sight the entire time - that had (what appeared to be) exactly what I'd painted on the wall.  My dad, Craig, says he knows how he did it, but to this day I can't figure it out.