How fast the current flows, churning up foam in its wake. If you wait long enough, you start to notice the way the water undulates. Before long, familiar shapes take form. Some of that froth taking on the appearance of ethereal, galloping water horses. Kelpies.
Those kelpie’s call-out, asking naïve gazers to come play and swim in the rushing water. To ride on their backs for a while, despite the danger. To be fair, the prospect can be quite alluring.
Though don’t fall for their tricks. They’re malevolent wee things!