Z is 4 Days Old Having Problems

nyc370z

Got my Z last Sunday and took it this morning to get venture-shield installed (didn't drive it since Sunday). On the way back, I hit bumper to bumper traffic. I have an AT and was pressing the accelerator lightly to keep up with the slow pace of the traffic. Once I let off the accelerator to roll to a stop, the car would start to lunge forward and shake.

I thought maybe this was normal for the car as I haven't driven it in traffic before... However when the traffic opened up I hit the gas and got nothing.... the car started to shake and buck violently...

At this point I pulled over and shut the car off... When I turned it back on it drove fine....

Is this a one time freak occurrence? Anyone have any idea as to what this can be? Almost feels like the transmission is shifting gears insequentially.

Has anyone experienced something similar? I know if I bring it to the dealer I won't be able to recreate the problem... I think I will drive it tomorrow to work to see how things go.

The car literally has 100 miles on it...