Like I said, look out for your head.
https://gothamist.com/news/big-chunk...CqSzdK-UR0GXLk
New Yorkers are getting used to watching out for debris falling from elevated subway tracks, but here's another example of why you should always be hyperaware of your surroundings: a large section of a wall that's part of the F/G line fell to the street. And as you can see in the photos above and below, it was a substantial chunk.