OK, not really, but that's probably what a news article would say.
What really happened was a family brought in their 8 month old mixed breed dog. He had kind of a big head, so the shelter they adopted him from called him a 'pit bull mix'. I see a lot more lab, personally; his body shape and coat are pure labrador retriever, but that's hardly matters: most people would indeed call him a pit mix.
As is common, I came around the counter and, after asking permission, squished his big face for a minute, then went back to work. He was very friendly and lick-y and completely untrained and unruly. A few minutes later, another dog and their person entered the waiting room, and both large dogs immediately started barking at each other.
As is often the case with dogs bites, it was my fault. The 'pit' mix was lunging against his leash and the kid holding him looked like he was about to fall down, so I ran over and reached out to grab his collar. My fingers ended up in the dog's mouth instead, and teeth closed down on them, but then quickly released, I assume because my fingers were getting in the way of his barking. It didn't hurt, it certainly didn't pierce skin, it barely counts as a "nip". Life immediately continued on. We separated the dogs into different rooms, things quieted down, I washed the slobber off my hands. I don't think anyone except me noticed I'd been bitten.
But there you have it. In the interests of full disclosure, I've been bitten by a "pit bull".