Then during the night they upheave their backs to relieve themselves of the pressure, and thus shake the walling to a fall."
"The Fairy-Faith in Celtic Countries"
W. Y. Evans Wentz
I felt very drowsy, and dropped off to sleep before long, my head resting on my knees; when suddenly I became conscious of a loud rumbling sound, while the earth beneath me seemed to shake and upheave.
"In the Rocky Mountains"
W. H. G. Kingston
The frozen crust was seen to upheave: and, the next moment, the head of the fox, and afterwards his whole body, appeared above the surface.
"Popular Adventure Tales"
Mayne Reid