Quiet like the grave.

[flickrvideo]https://www.flickr.com/photos/94044043@N00/14189799354/[/flickrvideo]

About half a mile upstream from my workshop is the outflow from The Strid in the river Wharfe.  If you fall in The Strid you may well pass this point 50 yards downstream deep under water.  NOT SAFE FOR SWIMMING!