A rogue Agent can be a very dangerous program. When Smith, the strongest of them all, was destroyed by Neo at the end of The Matrix, his programming instructed him to return to the Source, the Machine mainframe computer, to be destroyed or stored. However, because of Neo's attack, something changed in Smith that allowed him to defy his programming. The change in Smith ... disconnects him from the system, setting him "free" from his duties, in effect. This change makes Smith an "Exile" program without purpose. Smith's programming also takes on some of Neo's abilities as The One, such as the ability to withstand dramatic damage, and fly.