I want to know what your answer was? Mine would have been that...

  1. 22,627 Posts.
    lightbulb Created with Sketch. 1397
    I want to know what your answer was? Mine would have been that an electric train blowing smoke presents a bigger problem that which way it's blowing.
 
arrow-down-2 Created with Sketch. arrow-down-2 Created with Sketch.