Etch A Sketch was unveiled at the SIGGRAPH conference this week in Boston. And, as if a giant Etch A Sketch wasn't cool enough, it actually works. At the conference, some 3,000 people in the audience were able to control the monolith simultaneously by using two-sided paddles that signaled sensor cameras, letting one side of the audience control the right knob and the other side control the left knob. Things took a tragic turn, however, when the audience tried to shake the Etch A Sketch to erase their drawing, causing the entire structure to come crashing down on top of them, injuring dozens. Ok, just kidding about that last part, but the audience could actually shake the Etch A Sketch.