Mine does this same thing. It feels just like if you would drop a gear in a manual and just let the clutch out. In my case it has only done it to me on a flat road, not up or down hill. My wife and I each have one, and she has not said hers has done it. She would not hesitate to do so.
Mine also engine brakes enough that I don't have to use the brakes much at all. So much so that I'm afraid someone might rear end me cause I'm not lighting up the brake lights, so I'm on the brake anyway just to let the guy behind me know I'm slowing down.
Mine also engine brakes enough that I don't have to use the brakes much at all. So much so that I'm afraid someone might rear end me cause I'm not lighting up the brake lights, so I'm on the brake anyway just to let the guy behind me know I'm slowing down.