I must say I am starting to believe SR. Sorry.
The other photos you posted in your album yesterday when you uploaded the laying reclined photo do not show a horse in distress at all. And certainly none of the discharge associated with choke.
Also, while you were so very upset about your horse you posted in several threads totally unrelated to this.
I guess I am weird but if I was totally freaking out about my horse possibly being very ill I would not be able to respond to a question about kissing spine or if a horse would make a good hunter/jumper or not.
I have to second everything that always behind has stated.
If my horse was in trouble like the OP's horse was I would not have even thought to go on the computer, I would have called the vet IMMEDIATELY.
And the fact that you don't know what Banamine is, scares that crap out of me!