Everything looked fine but in that moment the mouse was gone. This happened exactly at the moment in which we want to show the unique debug facilities of Strawberry Prolog.
 
 

Here you can see how Dimiter Dobrev meets this nasty surprise. We kept on speaking for a bit longer but the audience wanted to know why we were not demonstrating on the screen and we had to admit that the mouse was gone.

 

The comment of our colleague Ivan Soskov was: "Noting strange that the mouse is gone. Look what a big cat is peering from the screen."

 

And this was the picture on the screen at that moment.