My chemistry professor decided to use colored chalk in lecture the other day to illustrate more clearly carbon rings and their hydrogen bonds. It was a good idea until she started pressing to hard, making the chalk squeak over and over...and over. No only does that sound make my ears want to cry, but it makes my teeth hurt for some unknown reason. So does the sound of cotton fibers pulling apart and gauze. Perfect example: in Ocean's Eleven (the newer one) when the acrobat is in the vault, he gets the gauze his hand is wrapped in stuck under the bomb and he pulls it out and it makes that terrible sound...*shiver*
Anyway, back to chemistry. So she kept making the bad sound and then apologizing, but seriously just stop. It's not worth the discomfort.
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