How the Large Underground Xenon detector finds dark matter

The video explains the setup and function of a dark matter detection experiment located a mile underground. It describes the structure of the outer tank filled with purified water to block unwanted particles, and the LUX detector filled with liquid xenon cooled to extremely low temperatures. Photomultiplier tubes detect light from dark matter collisions, and an electric field helps identify the source of these collisions by analyzing electron movement and light flashes.

Explain the significance of the flash detected in the xenon gas cloud.

What can be inferred if the flash is not in the center of the detector?