National Anthem

In Thailand, the national anthem is played through public loudspeakers at 8am and 6pm. Everyone is expected (or required, depending on who's enforcing it) to stand still until the song finishes. 

If you're a farang (Thai equivalent of gaijin, or foreigner) not in the know, you may be publicly reprimanded by a whistling enforcer. Of course, the rule is not consistently enforced. In a cafeteria, you may see the waitresses and janitors continue to go about their duties as the anthem plays. And I have seen people who are rushing to get on a departing bus who ignore this rule. And then there are those who seem to stop just because everyone else around them is stopping, so they obviously don't want to stand out and rock the boat.

All in all, it can be quite a sight (and photo opportunity).