Looking at the pictures gives me nightmares. A train does not belong on the escalator. It could have been much worse.

There is one very small upside: In the past when the O'Hare station was closed, the shuttle buses were free. That means that you will pay your fare at the next station (Rosemont in this case). That also means you'll avoid paying the O'Hare tourist tax -- the fare at Rosemont is $2.25 rather than $5.