Harry Kim in the Clown's guillotine
A guillotine was a capital punishment device that decapitated the victim with a sharp blade.
In 1996, Henry Starling had a small model of a guillotine on his desk. (VOY: "Future's End")
The Clown, a manifestation of fear who was accidentally created in Viorsa's artificial environment, used a pink guillotine to metaphorically decapitate people. Because he was part of a computer that monitored and controlled participants' vital signs, he used the extreme stress levels that accompanied fear to induce heart attacks and thereby kill his victims despite the fact that he was non-corporeal. The Clown executed two members of Viorsa's species before the arrival of Harry Kim and B'Elanna Torres, and during a subsequent escape attempt, he also executed Viorsa. (VOY: "The Thaw")
In the script of Star Trek, Leonard McCoy is described as looking like a prisoner waiting for the guillotine to fall in his first appearance. [1]