That is good that someone was behind you to warn you. We were going to Darlington for the NASCAR race. We had my parents motorhome, my grandpaw was following in his motor home, and a friend going with his was following him, which was a few miles behind. When we stopped to eat, the friend asked if we lost any green chairs. I didn't have green chairs and my grandpaw didn't say anything. We got to darling to set up camp, and my grandpaw didn't have buy one chair out of 6 that was in the basement storage compartment. Needless to say, his door wasn't latched. And my grandpaw even said a car was blowing the horn at some point, and he just assumed the driver was mad because he was doing 50mph on a 55mph road.
I was driving home from the beach a few weeks ago, and happened to look in my mirror, and my awning pull down rod was still hanging in my strap lapping in the wind as I was going 60mph. No one warned me about that. Thank the good lord that it didn't come off and go through a windshield and that I saw it. This was about 30 miles after departure.