The rabbit was still alive when I checked on it, so I called the Humane Society and they put me in touch with Wildlife Rescue and Rehab. The Humane Society lets WRR use an exam room at their facility. So I bundled the poor little bunny in a towel, put it in a box and zipped it out to the Humane Society. The very nice folks there took it into their custody, were going to give a look over by a vet and then get it out to a licensed wildlife rehabilitation facility. The woman who took the bunny squeezed its back paws in the box, that seeming to be test for nerve damage and it was able to kick at least one leg. I have high hopes for its eventual recovery.
Poor little bunny.