kidnap: to take a person away illegally by force, usually in order to demand money in exchange for releasing them.
The "usually" refers to the money, but the part that is "always" is the existence of an intent.
There was no intent here. This was a mistake, not on purpose. Nobody would say, unless to make a joke, "i was kidnapped by an elevator" Because the elevator works automatically, it has no intent to take the person by force and hold them hostage.
Can't believe i had to type this down.