At the bottom of the screen, there is a pile of gold, city, etc.
displaying your current stats. If you click on these, strange things
happen, most commonly the following:
After moving or using one of your units, it merely reselects that
unit usually. If you haven't selected any units yet, and you get an
enemy army, it will sometimes (about 15%-25%) select the enemy unit
for you to control (including neutrals, though you can't do much with
them) For the remainder of the times (I'm not sure what you have to
do- just experiment), it has done other strange things, such as
inverting the screen colors, showing where enemy units are in the
black area, and giving phantom Strength 39, Movement 18 Centurions (no
matter what army set). Some other things may happen- I've been playing
around with it for a while now.
Note: doing this has occasionally locked up my computer.