We've all done dumb things, at work we built a new office building (around 20'x20'), we got it completely finished and the boss (owner of the property we built the office for) said he had a big piece of concrete he wanted to put down in front of the door. He used his tractor (120+hp JD) to lift the 6'x8' (12" thick) piece of concrete, he was slowly pulling forward in the tractor to set it in place, when he hit the brakes to stop, the tractor kept going because the back tires didn't have enough traction (due to the weight of the concrete) and he ended up using the piece of concrete like a battering ram hitting the front of the new office. Luckily it wasn't moving very fast and everyone was standing back so no one was hurt. If you look at the office building now you can still see a 8' wide mark across the front of the building. I am so glad it didn't go all the way through the wall, I guess we built the office stouter then I thought.
Glad you and the GT made it out of the crash all right