Wearing black headsets with tentacle-like sensors stretched over their foreheads, the competitors stare at cubes floating on computer screens as their small white drones prepare for takeoff.
"Three, two, one ... GO!" the announcer hollers, and as the racers fix their thoughts on pushing the cubes, the drones suddenly whir, rise and buzz through the air. Some struggle to move even a few feet, while others zip confidently across the finish line.