A similar effect is driving or riding (motorcycle) over those archaic "Cat's Eyes" which are still being used here in the UK. A local road was recently re-surfaced after which the contractor diligently replaced the dreaded "cat's eyes" mounting them a good couple of inches above the new surface. What is an annoying thump thump in the car is a bloody nightmare on a motorbike. Never seen them anywhere else but here in the uk. Get rid I say !!.