A couple of years ago a large gondola crash landed in Italy (I think), because one of the wires ruptured.
During the construction of a new subway tunnel a large building collapsed in our city. It was a miracle no one died in that building. Two people were killed in the next building but the death toll could have been much higher.
In mining areas, old tunnels could collapse. Or active mines are a good place for needing Superman's help.
Ships in distress might need Superman.
Or think about Apollo 13. The space program seems to be much more active in the LnC universe.
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