We're forgetting the obvious situation where people are "detained" on a regular basis: elevators. This is just an elevator that doesn't traverse floors.
Have you ever ridden an elevator from the lobby of a large office building? If the security clerk at the desk thinks you're a threat, he'll let you get in an elevator and then press a button to stop you between floors.
When help arrives, they'll override the controls and force the elevator the ground where the only exit is into the hands of an armed response force.
Have you ever ridden an elevator from the lobby of a large office building? If the security clerk at the desk thinks you're a threat, he'll let you get in an elevator and then press a button to stop you between floors.
When help arrives, they'll override the controls and force the elevator the ground where the only exit is into the hands of an armed response force.