Well, what can I say, we are two different people, as most folks are. Different things grab our attention. Perhaps usually those we already agree with.
One of the first things I grabbed on to early on was to not go to a horse with a cut and dried plan for the day unless really going to work as in a cattle roundup. Even then, things can change. So much so that the person I was doing the round ups with always began the day by saying, "Ok Harold, what are we going to do today?" Things would often change that much.
Day before yesterday was the first time I hauled two horses in a trailer for 48 years except for the day before when I hauled Hondo and Rimmey around the field just to see how they acted.
I had to haul them 6.5 miles over a rough 4wd road all on private property in low range in the lowest gear for most of the trip which took 1:15.
I reconciled myself before I started that I might not even make it to the destination. I watched them in my rearview mirror. I stopped several times and talked to them. They just sort of seemed to say, "Wuts up Harold?"
As mentioned all went well.
There is no way to tell and this is just a very much newbie guessing but I'm wondering if your horse knew you were focused on I gotta do this and I gotta do this today and now. I have clearly seed Hondo and now even Rimmey pick up on that kind of approach from me.
Remember, they often times sense what is going on inside our heads that we are not aware of even though they may not understand the full or even correct meaning of it.
It really really could have been that when you saw the trash cans your subconscious or something said, crap! I'll bet he's gonna be shie of one on each side. Maybe not but that kind of attentiveness is one of the things you were recommending to me when I was having the spin bolt problem with Hondo.
It's hard to accept that the horse is never wrong because we have to decide we are wrong, and WE don't like to do that.