Tenderizing meat - bash the meat with the dumbell repeatedly. Great shoulder and arm exercise too! May increase the iron content of your food significantly.

Bowling - set them on end and use them as pins. You will need a really heavy ball for this.

Roll cage for a toboggan - for the safety-minded parent. Protect your child from the heartbreak of a rollover accident on the sled hill by having him or her carry this while going down. Nevermind that they won't be able steer because they're holding onto the thing...

Tenderizing meat - lay the meat down below the head rest and rock violently back and forth on top of it.

Baby toy hanger - nothing good on tv? Hook some old christmas tree ornaments from the top crossbar and set your baby underneath. You'll both be amused for hours!

Keeps doors closed - jam it in the corner behind a door. When you open the door, it squeezes the spring. When you release the door, the stored tension closes the door automatically behind you! At 40 miles per hour!!!

Tenderizing meat - set the meat on the counter, squeeze the Thighmaster shut with your hands then release the spring on top of the meat like a bear trap.

Tenderizing meat - of course, to accomplish this you'll have to throw the meat at it really hard.

Playing practical jokes on drunk friends - sit them in the machine then tell them to watch you as you run around it a few times and you'll see what I mean.

Pretending you're Captain Kirk of the Starship Enterprise - set phasers on "useless."

Tenderizing meat - remove one of the bows and slap the meat silly with it.

Burglar deterrant - set the machine in front of a ground floor window with all of the bows rigged up to the latch. Be sure the thief signs a waiver before attempting to open the window, however, as he's going to get up to 410 pounds of resistance right where it counts.

Unfortunately, they aren't very good for keeping your pants up, so that's out of the question.

Place mat/food warmer - somebody running late for dinner? Set their plate on it and turn up the juice!

Memorabilia - write the words "Golden Gloves" on it and set it on the mantle right next to your "Big Mouth Billy Bass (tm)" singing plastic fish!

Tenderizing meat - set the meat on the counter, place the belt on top of it, turn it to the highest level, then lean down on it with all your weight as it tenderizes and sears at the same time!

Driving safety gear - does your spouse have a tendency to get sleepy at the wheel? That's a thing of the past when they've got the belt on and you've got the controls in your hand...