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When in a car with someone else driving, and the driver starts driving over the bumps on the lane divider, you can yell out "Driving Braille!", in an indication that he is driving over the bumps, creating a rapid bump bump bump noise.

(Braille is the bumpy writing that vision-impaired people use to read)
John is driving back from a late concert through semi-windy roads with Jill in the passenger seat, John starts driving over the lane divider which causes the car to mildly vibrate and a rapid bump bump sound to start.

Jill: "Driving Braille much?"
John: "Shuttup I'm tired"
by JoeBCC June 13, 2008