Upon recently returning from a Grecian summer getaway, the culture shock of re-entering America hits hardest not from the mannerisms of people, not from the colossal grocery stores, absurdly expensive restaurants, or even the ability to flush bathroom tissue down the toilet. No. The biggest culture shock can be found on the roads. For myriad reasons, the automobiles in the Aegean nation are far more petite than they are in the USA. And finding oneself surrounded by 5,000-pound Class 2 vehicles driven by the least qualified among us on a high-velocity interstate is by all accounts, a culture sh…