Scientific papers were published saying it was twitching eyelids that explained it, or, you know, a human being's tendency to see patterns where there are none.

And then in the 1950s, late 1950s, the so called muscle relaxants were developed by pharmacologists, and it got so that you could induce a complete convulsion, an electroencephalographic convulsion you could see it on the brain waves without causing any convulsion in the body except a little bit of twitching of the toes.