Air heads

Here's another rule I've noticed. If you listen to the radio in the Tokyo area (try Bay FM), in between the usual mindless chit chat that the DJs spout, for no apparent reason, they will suddenly flip from Japanese into perfectly accented American English and say something like: "Yeah, it's a really cool track zooming up to the number one spot." Do all DJs the world over go to the same training college to learn how to be an inane plonker?