O.K.
I usually operate my Sun Blade 2000 from a Lay-Z-Boy, with the keyboard in my lap, and a Logitech TrackMan trackball Velcroed to the arm, so it does not fall off either. (Before the Suns started accepting USB, I was working with the optical mice, with the optical pad Velcroed to a weighted pad which sat on the arm, but the mouse would fall off from time to time. (No, not any of the stanard PC mouse or keyboard connectors -- instead a mini-DIN of a totally different configuration carrying both the keyboard and the mouse, and the mouse would plug into the keyboard.
The mouse tail was cable-tied to the overarm support for the monitor so it could not fall all the way to the floor, and could be easily reeled in when necessary.
Enjoy, DoN.