There is a nasty underside to the service industry in the US, a pure hostility between entitled consumers and workers who apparently feel entitled to have a higher job than the one they currently hold. As noted elsewhere in these comments, a simple trip between the US and almost anywhere else, say Japan, can be absolutely shocking.

I have flown between Japan and the US many, many times, and one of the worst things to have happen is to buy a ticket for a JAL/ANA flight, only to find out that it is "serviced" by a US alliance partner. This March I flew to San Francisco for a wedding and we had some bad turbulence that seriously delayed the food service. While I can understand that everyone was hungry/thirsty and the flight attendants felt pressure to get everyone situated ASAP, that does not warrant the flight attendant literally running with the cart and screaming "move your damn heads and shoulders!", which is one of the many things I saw. Needless to say most people on the flight were not native English speakers, which only makes such behavior that much more dangerous.

I know that it likely makes no difference, but I always take the names of attendants I see doing shit like this and report them. A similar cart pushing incident once left me with a bruise to my temple as the grossly overweight attendant slammed both the cart and her fat ass hip into my head while I was sleeping in an aisle seat. Just plain ridiculous.