Jack London,
Michael, Brother of Jerry
(1917)
“ Even they essayed to make him "loop the loop"--rushing him down an inclined trough at so high speed of his legs, accelerated by the slash of whips on his hindquarters, that, with such initial momentum, had he put his heart and will into it, he could have successfully run up the inside of the loop, and across the inside of the top of it, back-downward, like a fly on the ceiling, and on and down and around and out of the loop. ”
