When he was hospitilized at OSU when he started feeling a bit better, he began to throw out a buoy I had brought from home over the high wall of his enclosure and directly into the circle of vet students on rounds!  I believe they were grateful when he finally went home.

Don't ever let a horse get away with showing you his rump. That is a clear sign of "leave me alone, or I will kick you." My horse did this to me a few times, and I finally hauled off one day and kicked him instead. He has never shown me his rump again. Of course I almost went end over teakettle, but that was my own fault. Trying to keep the balance and maintain Alpha in my herd, I almost lost my own balance instead.

Understanding horse behavior really boils down to understanding your horse. For each horse is different and unique and if you remember the flight or fight response, and then take your cues from your horse, the two of you will have a rewarding journey in life.