Sensation of a gentle bump

On several occasions over the first month of ownership, I've felt a sensation as if being bumped from behind when taking my foot off the brake. I believe at least one other owner has experienced this as I read a post he wrote that for whatever reason was posted in a thread for a completely different subject. No one responded to his mis-posted comment. Who else has experienced this?

LALarry,

Only when coasting/braking to a slow stop have I managed to confuse the car and the result is a herky jerky stop. Never when at a complete stop and starting up. If you have the latter, I would bring it to the shop.

I have also experienced this.

All the time, every day multiple times. Great fit and finish...