Slingshot rider, Willem Hooft, shares video from May 11
"On May 11th 2020 I went sit-kiting at Scheveningen (The Netherlands). The sea was rough, the current was strong and there was lots of foam floating on the water. I decided to quit my session after getting slightly in trouble. When I came home I heard six other surfers got into trouble as well at the spot I was surfing, but with a terrible ending. Five of them didn't make it out alive. "
Source: https://www.kiteworldmag.com/news/willem-hooft-explains-tragic-ending-at-scheveningen/
More details: https://www.irishtimes.com/news/world/europe/netherlands-mourns-as-bodies-of-five-surfers-recovered-1.4251817
Edit: Willem is an adaptive kitesurfer. He's paraplegic. His story: https://colombiakite.com/slingshot-welcomes-new-adaptive-kite-surfer-willem-hooft-to-the-team/
Apparently the foam was 1.5-2m thick (yeah, meters) in places. For those not reading the news stories, they had to use the rescue helicopters to blow the foam way to see the water.
RIP