On a sunny morning in November, Jerry Moscovitch, a Canadian design engineer, was showing off the computer stand he’d invented to eight perfect strangers in Marshall, Texas.

“Inside here is a spring,” he explained, pointing to the computer stand, which he designed to hold two flat-panel monitors, as jurors in the federal district court room leaned in to see. “This part has bumps on it, and when you rotate it, the bumps come out of the pockets, and then the spring pulls [the arm] back in,” Moscovitch explained.