That’s exactly the kind of question I needed - thanks.
So here’s what I’m thinking: Sebastian is constantly finding himself stranded without fare money, keys, wallet, etc. and sometimes in no condition to get himself home. It’s always Mary Beth he calls to come get him, no matter the time or location.
In doing some research before writing this I came across some interesting things about airships and daredevils on the tops of buildings that might play in to Mary Beth’s fear. Also, for those on Pinterest, this board on 1930’s New York: http://www.pinterest.com/hillshezza/1930s-new-york/
So…do I need more? less? something different?