It has come to our attention that people are walking around the train without shoes. You need to wear shoes while on the train.  (laughing as he says this) We require that you wear shoes at all times, for sanitary reasons and because you could lose a foot as you are walking between cars.  We ask…we REQUIRE that you wear shoes at all time (still laughing.)

This came shortly after the announcement that profanity is not allowed on the train.

I am having flashbacks to chaperoning elementary school field trips.