I think I saw that item you were talking about (power sled?) on ESPN the other day. They were pushing it in some strongest man contest. That thing was piled high with plates and looked like it was killer. I think I'd have assuredly busted a nut.
Yeah, that's it! It's been kicking my ass. Haven't added any weights to it yet, but soon. Makes me want to vomit when I use it, but I guess that goes with the territory. Next step is tire flipping!