Many years ago I was in Port Lympne zoo, it was approaching closing time and as I headed for the exit I passed a young couple who were watching the wolves. The man decided it would be a good idea to climb over the safety barrier and squat down close to the fence, while his girlfriend took a photo. What the man hadn't counted on was that he was actually posing by a gate into the enclosure, and that the gap between the gate and gate post was just wide enough for a wolf to get its muzzle through.
The wolves were all lying around, looking about as threatening as domestic dogs, when one wolf saw its chance and seized the sleeve of the man's jacket. In a second, perhaps less than a second, the whole pack went wild. They were howling, running frantically about, some started fighting. A couple of wolves joined in with trying to kill the guy.
Eventually the man managed to slip out of his jacket and a tug of war ensued with the couple having hold of one sleeve and a wolf clinging on to the other sleeve. I was convinced the man had lost his jacket but amazingly the wolf let go and the whole pack instantly calmed down.
I've never looked at wolves in the same way since.