I bought my horse just under a year ago and I got her from 8ish hours away so I transported her up here, was a huge angle Gooseneck, the person transporting said she fell over three times but he gave her two compartments and said she was fine.
So I've been doing lots of float training and she loads perfectly (In my 2 horse straight extended front and it's wider and higher then normal), she stands in there for a very long time too. Happy and only a little wary.
Once we got to the stage of actually moving she flipped out soon as it went forward about 5inchs. All she wanted to do was get out. I was in there with her feeding and patting her. Soon as the car stopped (pretty instantly, but smooth) she stood up and calmed down. She hit her head on the roof (shes 16hh but about 20inchs away from the roof when standing)
That was with the divider bar in place. (That's not fully to the ground so she can brace her self) But I am yet to try with out it, but the thing is is she has some serious case of separation anxiety and I was hoping to travel her with her friend but if there is no bar they will kill each other (mares I tell you)