One thing I've seen a lot of while traveling abroad but never in the US is television screens on subway trains. I'm sure we'll eventually get them over here, but I'm in no hurry. I haven't minded them on my travels since it's always neat to notice the little differences between your home country and the place you are visiting and, more importantly, I've never been exposed to public transit broadcasting in an English-speaking country, so I couldn't really understand what was being said on TV anyway.
That being said, most public transit programming is commercials, so it's not that hard to understand. While riding the KCR in Hong Kong last November, we saw the following Red Bull commercial.
A few weeks ago, we saw the same commercial on American television. The US version features a different ending, as you can see here.
Michelle and I immediately noticed this difference. I assumed it was yet another example of American reactionary puritanism - bodily functions are sinful and evil but violence is ok. After reading the YouTube comments (hardly an authoritative source, I know), it sounds like Red Bull may have retooled the commercial between when we viewed it on the train in Hong Kong and on our couch in the US.