its just fun to break stuff.no math.
Keep it clenched if you do....i can try to do it with my butt
i agree never use non locking carabinersI'm not sure your experiment tells us a whole lot. I don't have time to do the math but, I'm guessing the force generated from a 200lb person falling mere inches is greater than the force generated by an 8lb sledge falling 3 feet.
Edit: Also, the concern in the other thread was more related to the non-locking aspect of the caribiner then the strength, although being cautious of the rating accuracy is also a good idea.