In my Weekly Round-Up yesterday, I covered an item called Obsidian and wrote: "This is an 'Old Gold' item from the 90s, but I can't think of what it was originally called. Shoot me an email if you know."
Much thanks to everyone who wrote in. Phil A. nailed it: The item was called ExerSlide. You can see it in action here.
Elizabeth A. also gets an HT (hat tip) because she remembered that Reebok put out a similar product called the Reebok Slide. A video of that product is here.
Which came first? I'm not sure. But kudos to my readers for having such excellent memories!