Wave-holding
Balance on a standing wave without moving. Beginners last seconds; Whit's first record was eleven minutes, set to impress Rill. It worked.
Fan-made

How you train a living rapid. Young rapids spirits learn on the Foamfall's side-channels — all fan-made fiction.
Nobody trains in the main current; that's where the boulders live. Young spirits start in the Foamfall's side-channels: fast enough to be fun, shallow enough to be survivable. The first lesson is falling well — foam-form on impact, reform downstream, grin like you meant it.
Balance on a standing wave without moving. Beginners last seconds; Whit's first record was eleven minutes, set to impress Rill. It worked.
Fan-made
Foam-whip accuracy against woven-reed dummies on the riverbank (see Combat Style). Scoring: points for the dummy, bonus points for style, disqualification for soaking the judge.
Fan-made
Long-distance communication: one burst for "come here," two for "look at this," three for "I did something and I need Rill." Every young spirit learns the code; every elder pretends not to know it.
Fan-made
The final exam, administered by Old Eddy in the Quiet Reach: sixty seconds of perfect stillness. Most rapids spirits fail it for years. Whit passed on the fourth try and calls it "the hardest rapid I ever ran." See Timeline, Arc 1.
Fan-made
Nobody, officially — Whit is past lessons and into legends. Unofficially, Old Eddy still assigns homework (currently: "listen to the Reach for one full flood season"), and Captain Heron still offers "flying lessons," which Whit declines on the grounds that "the river is already the sky, but wetter."