Originally Posted by Planigale
One way to look at this is to consider how many symptoms one has every day: short dizzy spell, headache, itchy skin, scratchy throat, gas pain, joint pain, etc. This is normal and most of the time people pay no attention to these things. (There are actually a few studies on what, given all these common symptoms, triggers people to seek medical attention. But I digress.)
Now say that person hears about a secret sonic attack. Suddenly those everyday symptoms come to that person's attention. "OMG, I do have a headache and scratchy throat! Look at my skin, does that look normal?"
This is a common sequence of events for this kind of hysteria.