The Joyboard is a joystick for the feet. A video game player stands on the board and moves his/her entire body for directional control. A standard Atari-type joystick (like Amiga's own Power Stick) plugs into the Joyboard to give the player access to a fire button.

The guys at Amiga Inc. liked to relax by playing the Zen Meditation game. They would sit as still as possible on a Joyboard so as not to close any switches, which is where the infamous Guru Meditation error in older versions of AmigaOS comes from.

Picture at http://www.atariage.com/controller_page.html?SystemID=2600&ControllerID=11

Commodore Amiga | Game controllers