And you know what could really throw a monkey wrench into the whole effort?
All it needs is to have the monkey wrench taken out of the pit.
A monkey wrench can be used as a vise for work as light as this.
Mr. Reardon shrieked, and charged, swinging his monkey wrench with all his horsepower.
"Now then, Terence, I have work for you and your monkey wrench," Cappy continued.
He had a monkey wrench in one hand and a greasy rag in the other.
And he went hunting all over the place and finally brought me a monkey wrench!
Looks like a case of Cupid throwin' a monkey wrench into the gears of commerce, eh?
He oughter be'n back in ha'f a' hour, but he come pokin' home 'bout dinner-time wid a screw-driver stidder a monkey wrench.
Will ye take it peaceably, ye gossoon, or must I brain ye wit' this monkey wrench?
Promoting preservation of the environment by sabotage
[1975+; fr Edward Abbey's novel The Monkey-Wrench Gang; ultimately fr throw a monkey wrench into the machinery]