The bounding robot whipped that single metal leg around with dreadful unerring precision, like some nightmare one-legged pirate. It whacked its complex metal foot against the earth like a hustler’s cue whacking a pool ball, and it bounded off instantly, hard. The thing spent most of its time airborne, a splotchy cannonball spinning on its axis and kicking like a flea against the Texan earth. It was doing a good eighty klicks an hour. As it got closer she saw that its underside was studded with grilled sensors.