Their skin burns. https://en.wikipedia.org/wiki/Microwave_burn

That's horrifying. And it yet again feels irresponsible to be selling this as a somehow safe method of crowd dispersal when in reality it's just a low power long range flamethrower.

Hopefully they're not wearing any metal earrings, piercings, etc that are exposed to the waves.

To cops that's a feature, not a bug.

Or if they are trapped their skin gets literally cooked.