Sarah Kerrigan was taken to an Umojan Protectorate research station. She claimed to have little recollection of her time while infested. Nonetheless, Valerian Mengsk tested her ability to control zerg, and she created a small hive cluster with a single starting drone. Dissatisfied from being confined in a cell, and determined to teach the prince the foolishness of attempting to control the zerg, Kerrigan took the test beyond its parameters which included spawning zerglings. The zerg broke out of the test chamber and rampaged through a sublevel, resulting in significant material damage but no human casualties... 'Lab Rat' mission from 'Starcraft 2: Heart of the Swarm' PC game. Gameplay on Normal... Watch more Starcraft videos: http://bit.ly/1b1W2yY.