Facial Flex Creepiness
OK, this one is just flat out creepy. This is not really an infomercial, but a segment on a cable access show called the Looseleaf Report. She starts out talking about how it works but somehow ends up in a musical rapture of insanity by the end. No matter what you think of the product, it is As Seen On TV entertainment at its finest!
(I included a link to the product below the video on the offhand chance that the segment sold you on the benefits of this interesting product!)