Wow... I ran mine at part throttle once & that was plenty scary. I had clay issues in til I got better teeth for my auger. Id go a foot, hit clay & that was it. A few hundred lbs on the auger or water in the hole overnight didnt help at all. It had fat frost & rock carbide teeth. Put in thinner sharper ones & that helped. That was on a beefy nice name brand auger started with a P I think. My cheaper 12" from the local ranch store has even less issues. Thinner teeth that will wear out a LOT faster I'm sure, but they dot even flinch when they hit the clay layer.