Many pet owners have seen this behaviour, and what I find note worthy too is that that trauma can be easily detected when the animal doesn't react according to intention.
Anecdotically, I adopted a mistreated dog this year. He's a really good boy, and shows the exact same behaviour the paper states regarding accidental interactions in general. But if you are for example brooming and slightly touch him, he immediately hides and may even piss himself. It seems to me that he was beaten up with some kind of stick when he was just a puppy. Poor boy :(
Anecdotically, I adopted a mistreated dog this year. He's a really good boy, and shows the exact same behaviour the paper states regarding accidental interactions in general. But if you are for example brooming and slightly touch him, he immediately hides and may even piss himself. It seems to me that he was beaten up with some kind of stick when he was just a puppy. Poor boy :(