Ultron was an artificial intelligence peacekeeping program created by Tony Stark from the decrypted code derived from the Mind Stone encased within Loki's own Scepter, retooled by himself with the help of Bruce Banner with the intent being to protect Earth from any and all domestic and extraterrestrial threats coming within the future. Possessing multiple of host bodies under his control as well as a variant of Stark's own personality, Ultron however had soon deemed humanity itself as the greatest threat to peace on the Earth and attempted to create his technological singularity by committing genocide against them, leaving only his own doubles left in his wake.
Punches Thor in the face, giving Thor scars for days. We can see he still has scars from the 'Elevator's not worthy' scene.
Flies a great distance in a short amount of time.