. . . you've ever put on your Vest and turned it down to the lowest frequency while you sing so it sounds like your voice has opera-singer vibrato.
Haha, I used to do this all the time when I first got my Vest when I was around 12 years old. Something made me think of it this morning, so I gave my husband a demonstration - and it was pretty awesome. If only my voice had any kind of natural talent for finding the notes in the first place, I might be on to something here!