A method and an apparatus for detecting items in objects, such as in luggage, wherein a detector apparatus, functioning as a second detector is divided into a lower testing stage and a higher testing stage. The indexing stunt selector may be disposed along a toy vehicle track and includes a first stunt element disposed in the vehicle pathway to cause a toy vehicle to perform a first stunt, where performance of a first stunt results in actuation of a first stunt trigger. The transfer sleeve may be configured to receive BMG feedstock from outside the vacuum chamber. Alternatively, the shield material comprises a shielding element consisting of an elastic polymeric organic compound and a particle having a nuclear or electromagnetic radiation-shielding ability, such a heavy metal or ferrite. The electronic circuit includes a rectifier circuit to rectify alternating input current of the alternating current power supply, and a feedback circuit for feeding back a switching signal to the rectifier circuit circuit to switch the rectifier circuit on and off. In particular, the birds are placed into a sealed chamber and the pressure in the chamber is reduced at a continuous rate to a target decompression pressure.