Reference to Freeman's mind.
No, not you, damn it! Your help isn't any help at all! You're just breaking things! [shoots Vortigaunt] I can do that! [kills headcrab] I can do it better! [kills two more Vortigaunts, then accidentally shoots what appears to be a computer server] Oops. Uh, that was to prove a point. Guess nobody needs that computer now. I wonder if I just screwed somebody using our network. Network errors are lame. They're always [shoots headcrab] "404!" Or [shoots headcrab again] "503!" Why can't there be "Error 482? Somebody just shot the server with a 12-gauge. Please contact your administrator."