http://www.spectrum.ieee.org/dec05/2344
Carl W. Selinger
"Oops, you just made a mistake! You forgot to go to a meeting, or you went to the wrong place, at the wrong time, even on the wrong day. Or you suddenly realized you made a wrong assumption for a calculation. Or you hit 'Send' too quickly on the e-mail before you attached that document. You feel terrible. You are really stressed. "
