chunk: While Poole is on a space walk outside his EVA pod attempting to replace the unit, Hal takes control of the pod and attacks Poole, severing his oxygen hose and setting him adrift. Bowman takes another pod to attempt rescue. Meanwhile, Hal turns off the life support functions of the crewmen in suspended animation. When Bowman returns to the ship with Poole's body, Hal refuses to let him in, stating that the astronauts' plan to deactivate him jeopardizes the mission. Bowman opens the ship's emergency airlock manually, enters the ship, and proceeds to Hal's processor core. Hal tries to reassure Bowman, then pleads with him to stop, and finally expresses fear. As Bowman deactivates the circuits controlling HAL's higher intellectual functions, HAL regresses to his earliest programmed memory, the song "Daisy Bell", which he sings for Bowman.