> Here in Lithuania, flashing your warning lights (the four orange ones on the corners of the car) means thanks, for example if you let someone merge from one o

> Here in Lithuania, flashing your warning lights (the four orange ones on the corners of the car) means thanks, for example if you let someone merge from one of the very short onramps. There's a similar custom in South Korea, where the warning lights are often used as a "thank you" if somebody lets you cut in front of them.