I'm glad everything turned out OK. In case others are reading this, research how to load and tie down loads properly before heading out on the road. I've been tying down ladders and siding equipment for over 25 years and I'm lucky I never hurt anyone before I learned how to tie a load properly. With vehicles, you must tie to the axles, as then any suspension flex won't loosen or drop the straps/chains. I use four ratchet straps, going from passenger side vehicle to drivers side trailer, and the opposite for the other strap, same for the back. Another way is run a chain over the pumpkin and under the axles, then pull on the front of the vehicle with two straps.
In any case, I hope you don't have another adrenaline rush like that again.
Richard