The wheels struck it, and the car lurched heavily....
Simultaneously Tarzan was dragged from his feet and the plane lurched sideways in response to the new strain.
Several times the girl lurched heavily against her, and as the two went up the avenue a curious crowd of so-called civilized people turned and gazed at them.
Then the sled lurched ahead in what appeared a rapid succession of jerks, though it never really came to a dead stop again...half an inch...an inch... two inches...