This video shared by Sam Katich on YouTube shows some pretty intense moments of a 22 foot boat, weighing "well over a ton"  that goes missing into the rollers at Pilgrim Rapid on the Snake River

If you pay close attention, you can see (starting at :43) the boat in trouble on the horizon to the left. It's circling in at attempt to escape being swamped by water moving at 27,000 CFS. And for a split second, the boat totally drops out of sight. At the very end the boat barrels out of the current and to the relatively calmer waters on the right. We are glad everyone is okay. This could have been much worse.

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