I used to work with a couple who would bring their sizeable, sweet dog (an Akita, I think) to work...for whatever reason...and that dog would goose me when I had my back turned and was putting some papers into people's mail slots. It never failed. Apparently, I was just the right height. I would swing around, after I came down from the ceiling, and sternly say to her (with my teeth clenched ,) "Get your behind under that desk!" and she would. I'm not much of a dog person, but she was such a sweet dog, and I learned not to fully turn my back on her, just in case. I think that, for her, the thrill had to have been in my surprise/shock!