New trailer first oops

My cousin drove off with the tailgate up! He said (*%^$@)_)&${OUU.!!! and a few other words I had never heard. I was going down this hill minding my own business and a wheel and tire passed me on the left. Some guy flagged me down and tried to say it was mine but I told him I only run 3. Sheared off all 6 bolts. Even if it's 80 degrees in NY you sweat trying to replace lug bolts by driving them out and then new ones back in. Probably saved $300.00 tho.