I got to sit at an air traffic control terminal this afternoon and direct surface traffic for a couple of hours. (the terminal is our Future Flight Central simulator, seen here:
http://www.nasa.gov/centers/ames/news/releases/2008/towercab_lax_high-1ratio.html and the traffic was all simulated). After the initial training, I only caused 3 runway incursions, sent 4 airplanes to the incorrect gates, caused 2 unrecoverable traffic jams, and crashed the simulator once. Maybe next week they'll let me route air traffic in the east coast snowstorms!