If an electric train was going north at 100 miles/per hour which way would the smoke blow?

“North”

People might think the smoke would blow in the direction the train is traveling, but electric trains do not produce smoke.

“South”

Some might assume that smoke would blow in the opposite direction of travel, but again, electric trains do not emit smoke.

“East”

This guess could stem from a general thought about wind direction or train movement, but it is incorrect because electric trains do not have smoke.