Well it stopped the grinding disk before it completely left the RHB. If that had kicked back towards yourself than it pretty much stopped you from getting a very nasty cut!

It doesn't stop the kickback, but it stops the wheel as soon as it detects kickback.

I’m sure your comment was a joke, but did you notice the blade is still intact and the machine only lifted up a bit then the motor stopped ? That’s actually some bloody amazing kickback control. If every angle grinder had that feature, it’d save a lot of lost wages and careers and lawsuits and paramedic call-outs and hospital stays and prosthetic eye 👁️ manufacturers would lose business.