Stanley was messing around in his office, finding a bug in the game and of course exploiting it. However, it ended up developing into a virus in his code, being overly annoyed and hateful to the Narrator, despite his efforts to help him get the virus out. The two were arguing, it getting more and more heated. He slipped out something, very harmful to the Narrator.

'This is why I skipped you in the skip button ending! Cookie9 was right, you're god damn annoying!' He thought angrily at him.