President Obama visited a D.C.-area high school today to hammer home, once again, how important he thinks math and science and all the like are to the future of the country, and to watch a demonstration of this ball-launching machine that some of the students made. “I believe that robotics can inspire young people to pursue science and engineering. And I also want to keep an eye on those robots in case they try anything,” he said in his remarks, to the laughter of the students. You know who wasn’t laughing, though? That ball-launching machine. It was too busy plotting.