What do you think makes the vertical striatioins under the spoiler and tail lights and along the bottom?
The only thinbg I can thing of is inverse Cymatics.
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Cymatics
Cymatics is a subset of modal vibrational phenomena. The term was coined by the Swiss physician Hans Jenny. Typically the surface of a plate, diaphragm, or membrane is vibrated, and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste, or liquid. Wikipedia
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The buffeting air is vibrating instead of the car. A tiny sucking sound.