When MacGyver fools the store manager into dialing the phone number of his crook-partners, he has a hidden tape recorder with him so he can record the sounds of the numbers as they are being dialed. As the store manager is dialing the last number, MacGyver says something quite aloud. However, when MacGyver goes to his car and plays the tape in order to try to figure out what the phone number was, his voice has now mysteriously disappeared from the tape