You know those "Shake weight" ads? ... and the motion that you are supposed to make???? Well, I've been doing something like that - sans weights - for the last 50 or so years...... and, not only have I not developed muscles in my chest or arms!!! ... but, my eyesight has deteriorated, JUST AS MY MOTHER PREDICTED IT WOULD!!!!!!!
Well, I wouldn't buy one of those weights pictured, but I'd more than gladly watch "Goonies" several more times to watch Chunk "shake weight" with the Truffle Shuffle at the beginning part of the movie.