Yesterday we did alot of pruning and covered the load with a tarp and put a 12' orchard latter and a 8' fibergalss latter on top. I forgot to bring straps so figured I could get to my house it was only a few miles. I hit about 40 and look in mirror to the latter starting raise up, before I could pull over I see both latters go flying though the air doing flips over the back ramp. I was very lucky no one was behind me. I will be sure to tie down every load from on. The latter could has went though a windsheild and killed someone.