2Hostyl said:
...to prevent someone's eardrum from rupturing due to "suction pressure".
lata,
jeremy
--who has (had) a ruptured right eardrum...
are you serious, thats the right answer?
The ripples or ridges allow for a constant flow of air (basically an air 'leak') that prevents the formation of a vacuum thus eliminating that possibility.
lata,
jeremy
--who actually figured that out the first time riding OL:FOF
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