This one consists of literally one single paradiddle followed by one double paradiddle followed by one triple paradiddle (with accents!) all played consecutively. However, the challenge is to keep a steady two-beat pulse underneath with the bass drum and hi-hat (sorry...the bass drum isn't very audible on the clip below!)
The paradiddle combination is an 18-note cycle (that switches hands back and forth, each time) and it moves around the beat in a somewhat unpredictable way so you really have to concentrate to keep your rhythmic balance centred.
I supposed you could also up the ante as well by orchestrating the accents of each paradiddle around the drums and changing the bass drum/hi-hat to a samba foot pattern (paging Mr. Dawson!)