1. Open Excel. Make sure it’s a brand new Excel.
1. Press F5 when Excel is loaded.
1. Enter X97:L97 (if you are using Excel 97) or X2000:L2000 (if you are using Excel 2000) and press Enter
1. Press Tab once
1. Press Ctrl+Shift and left-click the Chart Wizard button on the toolbar.

You'll be looking at a purple full-screen animated image3D landscape. Use the mouse to move around to "fly" over the landscape (the mouse changes direction, left button moves forward and left button moves backwards). Fly around a bit and you'll see a gray stone pyramid. Fly to the side of the pyramid that's black and you'll see the credits scroll by.

Watch the list of developers for Excel scroll by.