I worked in dog kennel/vet clinic when I was in high school. The vet asked me to hold a St Bernard while she trimmed its nails once. He smashed me straight in the chin with the crown of his head and knocked me out cold. I came to with the big galoot licking my face.
Guessing. Definitely outweighed me. It wasn't mean at all, and the lens snapped back into our glasses frame. We were dazed, but didn't lose consciousness