I think I posted this already, but this happened to me this summer in Wenatchee towing my old Prowler from my dash cam.
Truck in front of me changed lanes and then a small metal shelf lifted out of his bed, right in front of me. There was a box truck behind me in the right lane and I saw the shelf drop out and glanced at my mirror and didn't see the box truck in my way, so changed lanes as shown below.
https://www.youtube.com/watch?v=n0EVPUxxMaAOnce I made the lane change, I actually accelerated, since I knew that box truck was going to be behind me and probably slamming on his brakes..
I don't actually think I hit my brakes at all during the maneuver..
Not the only one in the last 35 or so years of towing stuff, but the only one I have a dash cam of! :)
Mitch
