The graph shows Earth's frequency, devised by the Russians after one of their space launches failed when the two cosmonauts aboard tried to kill each other. It was determined that anything off our (Earth's) normal frequency messes with our minds and people become insanely aggressive. Studies show they want to bite, kill and obsess with anyone who enters their field of focus, all the while aware that they are behaving out of their norm.

So the whole point of the Schumann is to be used as a gauge of psychologically bizarre behavior. It is a 'heads up' to expect the unexpected from people.

'Freaking out' is a subtle play on words that the OP understands the significance of the information. A detail you may have missed.