Rather scary event on Nav on Autopilot yesterday. Driving 70 on a 65mph freeway (divided roadway) that turns into a 2-way 55mph (undivided) road at one point. Without notice at the point where the road turns to 55 the car rapidly slowed from 70 to 55 (like hard-braked) and worse, the wheel, which I had my hands on, yanked hard from left to right, causing the car to literally swerve left/right. No one was immediately behind me thankfully, and as I said I already had my hands on the wheel (of course). I'm not sure what would have happened if, as is usual in CA, I was being tailgated at 70 or if I didn't have manual control of the steering wheel (which you are supposed to do, again, of course). Makes me wonder about using Autopilot. Ever happen to anyone else? Any ideas why? I know it's Beta, but my wife was not happy. She may not be a FSD fan quite yet.