Hold the Alt key while you open the About Photoshop option. (In PhotoShop 4, hold CTRL and ALT then click on the little Photoshop picture on the toolbar.)
The usual credits screen appears. But wait!
Wait several seconds for the credits to begin scrolling
We all know pressing the Alt key will speed them up ...
Now, while they're speeding, click the big eye once ...
While you're still holding the Alt key, press the Ctrl key
Now, let up on the Alt key
About 60 secret messages will pop up just above the scrolling credits