I used to work in a computer lab, open plan, where we all had CRTs. I sat across from the main DB admin, who had TWO monitors for all the work he was doing (wild stuff to have dual CRTs back in those days.) Due to the layout, my monitor sat in-between his, facing the opposite way of course. I loved degaussing my monitor because:

1. It would degauss both of his and
2. The EM fields were so strong between them that my monitor’s image would flip entirely upside down before snapping back into frame while making just the craziest electronic noises, colors dancing all over the screen. Gorgeous stuff! I wonder if anyone has tried to recreate a degaussing effect using shaders to simulate the process?