If it wasn't real the Salesperson would have done a much better job of being a salesperson! BTW, I thought it was classic. I am sure all of us have had an unassuming driver put on a show with us in the car. I have wanted to react that way many of times!
I say real. The dealership was probably in on the prank and probably even chose the perfect salesperson to have this prank pulled on. I am sure they set the car up with the drink holder knowing that they needed a place for the camera. Funniest video I have ever seen on the Internet. I watched it 10 times and laugh so hard each time.
Definitely real, just like the Kyrie Irving, Uncle Drew videos! If you were Jeff Gordon would you have wanted to do that as a prank or do it staged? Definitely as a prank!