Aha Trivia Stuff Everyone Should Know
Aha Trivia: Stuff Everyone Should Know · ahatrivia.com/mb-whitewater-e2aded560103

What is a pillow in whitewater?

Water piling up against a large obstruction.

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  1. Water piling up against a large obstruction ✔
  2. A floating sleeping bag
  3. A calm sandy beach

Why: A pillow forms when a large flow piles up or boils against a big obstruction, often signaling a rock is not undercut.

Huh, didn't know that: A pillow forms when a large flow piles up or boils against a big obstruction, often signaling a rock is not undercut.

The dad joke
That rock has a soft pillow of water.
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References

Answer: Water piling up against a large obstruction. A pillow forms when a large flow piles up or boils against a big obstruction, often signaling a rock is not undercut.

  1. Whitewater en.wikipedia.org/wiki/Whitewater
    Pillows are formed when a large flow of water runs into a large obstruction
    Checked 2026-11-07.

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