Cloud and Zack were among the wounded survivors who were apprehended by Shinra as part of a cover-up of Sephiroth's massacre. Professor Hojo subjected these survivors to an experiment, performing the same enhancements given to SOLDIER members—a procedure which included Mako showers and the injection of Jenova cells. All but Zack entered a comatose state, and nearly five years later, Zack broke free from his confinement and took Cloud with him. However, the alien Jenova cells in Cloud's body still allowed Sephiroth to modulate his behavior. Moreover, the cells' ability to duplicate information allowed Cloud's mind to construct a false persona built around Zack's behavior. This was prompted by Zack himself, who was killed outside Midgar by Shinra soldiers during the escape; he urged Cloud to live both their lives before passing on. Afterward, Tifa discovered Cloud, who was wearing a SOLDIER 1st Class uniform, and offered him a job with AVALANCHE.