Robin said:
a) While watching CRT...
b) ....clean teeth with electric toothbrush.
Perhaps originally named "The Cheetos Effect", for those of you who
have not been targeted by U.S. snack foods, Cheetos are a crunchy
snack food. Decades ago, about the same time that large high
resolution Sun monitors became common, it was discovered that the
images on the screen would jump back and forth as you crunched on
your Cheetos. The effect is really quite startling if you haven't
seen it. But I imagine that an electric toothbrush REALLY over
does this and I will have to try that.