Random Comment - Germans

When you go to a different country, you expect that some things will obviously be different. But it really never occurred to me that something can be completely normal in Germany, but seen as rude in America.
For instance - what I would call common courtesy.
If you´re in line at the Post office, no one will cut in front of you. That´s really no problem. But if you´re waiting for the S-Bahn (subway) at the platform and the door stops right in front of you, there will be 3 or 4 Germans running in front of you, and of course there will be one seat too few for you. If you´re waiting for the bus it´s the same thing, but I think it´s more "every man for himself" with busses. Like the mentality is if you aren`t one of the first on the bus they might leave you behind.

Another thing - Germans and being helpful. It probably really just is cultural - if youre walking down a crowded street, everyone walks as if everyone else was in their way. There is a cold glare straight forward. "I am walking here and this is my path." So in the same sense, German strangers will only be helpful until they feel that they are no longer unhelpful. I will elaborate about Universtität Stuttgart next.