At a computer summer camp back in the 90s we had a "wicked fast" 40MHz Macintosh IIfx with 4 double monitor cards and one single monitor card in it, and did that.
Arrange all nine monitors next to one another in a semi circle around the chair. Start the mouse at one end and spin and spin and spin it.
We also tried the 3 columns of 3 monitors, but it was hard to stack them close without building a special piece of furniture.