[eclectric]

The next level i.e., rate of change of Jerk is called Jounce. However, I'm afraid I don't know how that would be described in car passenger's terms in your example.

[dalke]

I personally prefer snap over jounce, as that gives the progression snap, crackle, and pop.

See https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...

[johnea]

Why would anyone downvote this?

Obviously, someone on the intertubes was being a jerk about jounce!

[throwawaylaptop]

Cars have "jounce dampers", also known as bump stops.