What does "Alex gets off at Union Station." mean in English for Spanish?

In English for Spanish, "Alex gets off at Union Station." means:

Alex se baja en Union Station.

Listen to "Alex gets off at Union Station.": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 2, Scene 6