This thread reminds me of something.
Some years ago when my daughter first got interested in horses, the horse went lame. Although it was still standing up and was being ridden at the time. Although limping a bit.
A supposedly knowledgeable "instructor" said "ruptured Suspensory Ligament". We immediately crapped ourselves of course and thought the worst, until we read up on it.
If there are any vets out there I'm sure I just heard one fall off his chair and spill coffee all over the keyboard.