<p>I'm sure there were several, but the one I was thinking of would display a nice text screen when you crashed the computer thoroughly.  </p>

<p>The Text was "Well smoke me a kipper."</p>

No one else has answered this, so I'll answer the part I can: the original Macintosh debugger was
MacsBug
.
So far as the kipper quote goes, the only thing that comes to mind is the
Pathogen
computer virus.