So me and my dad were going to pick up my walkbehind from storage today and on theway to pick it up we had some problems on the high way. We were pulling my 6' by 14' landscape trailer with my dads 2500 dodge and all of the sudden we heard this noise and we looked out the mirror and there was my trailer rolling across 4 lanes of high way and it hit the middle wall and sparks went flying. We pulled off to the left berm and my trailer went for about 100 feet just riding the middle wall with sparks flying. I think every swear word possible was said by me or my dad.Thank god there was no cars within 100 feet of us. After the cars passed we pulled over to the high speed lane and dragged it over to the left berm. We found that it ripped the safety chains off the trailer and the part that locks the ball on the bolt that was in there fell out and it must have been enough to wiggle it up which caused it to pop off. Suprisiing there was no damage except for some paint that was scrapped off and the angle iron that comes up from the trailer was maybe bent half of and inch in one place. But no one was hurt and my trailer is fine thank god it was empty other wise who knows what coulda happened.