I’ll post the tweet:
https://twitter.com/ryan/status/313755123295854592
Ryan Block posts an image of a popup dialog. At the top is the word “cancel” to the left and an x to the right in a grey box; this would presumably be to remove the popup entirely and cancel whatever action caused it.
The message text says:
Are you sure you want to cancel this action? Click ‘OK’ to cancel the current action or ‘Cancel’ to continue.
The buttons presented are OK and Cancel.
Super lawlz.
Ah, developers … you gotta lovem. 
[font=verdana]Yup, that’s pretty special.
If you click ‘Cancel’, does it pop up another box asking if you’re sure you want to cancel cancelling whatever it was you were doing?[/font]
It would be clearer if it said—
Top left: “Really Cancel”
Top right: “Cancel Cancel”
Bot right: “Really Cancel” | “Cancel Cancel”
Nice find. I guess this is what happens when developers stare into a monitor just a hair longer than they really should.
Or maybe a hair less? A little more thought for the front end / usability / accessibility never hurts.
Cancel infinite loop!
cancel… inception
Another example, now about accessibility, in particular good for the red/green colorblind people:
[CENTER]
Press the green button to continue[/CENTER]
From the Dutch site: [U][B]accessibility.nl[/B]/kennisbank/artikelen/kleuren/kleurenblind[/U]
More or less English Google-translation: [U]http://translate.google.nl/translate?hl=nl&sl=nl&tl=en&u=http%3A%2F%2Fwww.accessibility.nl%2Fkennisbank%2Fartikelen%2Fkleuren%2Fkleurenblind&sandbox=1[/U]
we should collect these things and put them in a book.
we’ll call it “Tales from the Norman Doors”