The Inspector searched the mantel and under the carpet, as a matter of form, but there was no key anywhere. "Do your stuff, kid," he ordered.
The young operative became deadly serious as he went over the lock. His hands made a few deft motions, involving the use of a long coiled spring, a screwdriver, and the blade of a knife. Then he placed his shoulder against one side of the door frame his right foot against the other, and pressed inward
There was a sharp click, and then the door opened. Swarthout looked at his wristwatch. "One minute and forty-five seconds," he announced. "I wish the professor who flunked me in Mechanical Engineering could have seen that."
(from Murder On Wheels, by Stuart Palmer)