I've always listened to a lot of jazz and heard some weird rhythms, but only this year did my high school offer music theory - and right now, we're learning about rhythm. All we've done so far is transcribing rhythms in non-complex meters, with pretty simple subdivision. But we've been doing a lot of it, so now whenever I hear a rhythm I try to think of how I would write in my head. Usually, it isn't that complicated.
That is, until I listened to "Thrust", by Herbie Hancock:
Now I've heard my fair share of weird, 13/16 or irrational time signatures, but what makes this stand out to me is that as far as I can tell, it's in 4/4. You can try counting along and you'll find that the opening drum groove repeats smoothly after 8 beats.
So then why does it sound so weird, almost as if you're missing half a beat at the end?