Angular movement may very easily be seen everywhere around us. For example:
Speed of Earth's rotation calculated on the Ecuador is aproximately 465 m/s. Average speed of Earth's revolution around the Sun is about 30 km/s. Our Solar system rotates around the centre of our galaxy with speed of around 220 km/s. And so on.
Things rotate, everywhere, some of them longer, some of them shorter, some of them spin at constant speeds, some of them don't. Some people get really fascinated by the whole thing, some even write their phd's on the subject, some however, don't care, but most of them at least notices it. Children often draw circles on their drawings, and two of them can very often be seen on the daily or on the nightly sky.
Aside from that whole story, we're mostly interested in two particular angular speeds. One of them is at 33, and the other one is at 45 RPM's.