Another word for entrapment: the art of being trapped. To be closed in. To contain. Held against will unable to move from a area. Locked in, intraped intrapment unit.
The birdcage was an intrapment for the birds. The enclosure intraped the lions.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.