and electric bikes like this...
and literally everything in between. Since the OP originally said motorcycle I'm leaning towards the larger end of the scale but we don't know.
In any case, the OP admits to riding and at the speed of the car in front of him and intentionally hiding behind the car. Had the driver turned on his turn signal the OP wouldn't have known because of his position and the fact that he was to busy trying to hide.
As for your comment about the driver wondering where he went, the driver may have assumed he turned off the road which is exactly what I would have assumed.
And as I mentioned in my first post the OP is lucky to be alive. When you are on a bike be it a Huffy or a Harley you are going to lose when it comes to you vs. a car of pretty much any size.