They may not be athletic but they can get themselves in the air and this one launched and hung from my arm. Suit jacket has a scuff and shirt was not even torn (both were bloody, though) but I have one deep puncture and another puncture surrounded by shredded skin. The damage is all from the strength of the grip not the sharpness of the teeth. Will be on antibiotics for a while.
Damn. I remember being chased by this unchained dog (pitbull I think) my final year of college. Fortunately found a house with an unlocked patio door. I did get mauled by my family guard dog (chained up 80% of the time as is the Nigerian way) when I was 5 or so. Still have scars on my shoulder from it. Needed rabies shots for a while.