As Bring Your Child to Work Day wound to a close yesterday, one defining image of the day will stay with me. The 6:10 to Mount Kisco was somewhere between Valhalla and Hawthorne when a dad attempted to lead his young son from one car to the next as the train hurtled ahead.

Mind you, it wasn’t one of those door connections that’s sealed off from the outside, assuring you won’t crash to the rails and die. This one was wide open, and the kid was out in the middle of it.

Mercifully, in the car the man and his son were looking to enter, the engineer had left his booth door open, barring entry into the car and forcing the man and his son to return to the car from which they came.

What was the man thinking? Hey kid, here’s how we save ourselves 30 seconds of walking on the platform once we get off the train?