[pifm_guy]

Here is a news report with video footage of one such incident (the part where the victim is decapitated is clipped from the report): https://youtu.be/3IwhsYfnNvs

I am personally aware of quite a few speedboat related accidents, some fatal, and this is a common pattern.

The types of death that people imagine (boat sinks, boat engine dies and drifts out to sea) tend not to be killer in small boats because they mostly operate in busy waterways near shore where someone else will come help.