I had been meaning to post this. Our dog tore her ACL a couple of weeks ago. She was running down a hill and suddenly came up lame, limping and whining towards me. She rested for the next couple of days until we took her to the vet, where they sedated her and took x-rays. They couldn't tell if it was fully torn or partially torn (due to inflammation), so they sent her home with some meds. The very next day she was better, so it's probably just partially torn. At this point she walks around with no limp and minimal signs of injury (slight favoring of one leg).
Regardless, she will probably have to have surgery as dogs don't know they should go slowly and at some point it'll be fully torn. I'm a very sad camper, but the surgery is supposed to return the dog to near full capacity, so my hope is that one day I can take her to the park and watch her sprint for a toy. It also impacts my graduate classes, as classes + dog surgery are a) expensive and b) time consuming, and I'm not sure I'd be able to reasonably handle both at the same time.
The whole "not being able to do anything but wait" is freaking killing me.