"A spy. He was discovered on the hundred forty-seventh floor, and
managed to get into the elevator before the Army could catch him. He
jammed it between floors. But the Army is doing everything it can think
of to get him out."
"Well--but why should there be any problem about getting him out?"
"He plugged in the manual controls. We can't control the elevator from
outside at all. And when anyone tries to get into the shaft, he aims
the elevator at them."