With a little practice, I can play just about any polyrhythm that is physically possible. I've been obsessed with them for years. When listing to polyrhythms, I love how they invite you to isolate the different rates/grooves/feels. I love the beautiful patterns they make. When I was studying percussion, I taught myself how to play tons of them, and to this day, there is likely nobody else on earth who has played a polyrhythm with this many layers (21):