screwballs in the cold

Yesterday when I got to the barn it was cold and had just started snowing.  Nina was in a sheet because the day before was too warm for a blanket, but she was cold and needed her big Rambo. 
I had been going to get her out for a little exercise, but the ground was frozen solid and slippery so I decided to pass.  I also decided to just throw her blanket on over the sheet which turned out to save some rodeo time.  I threw the blanket up on Nina - I have to throw, she is 16.1 and I am 5-5 so it has to land UP there - and she skittered around and flung it on the ground. 
Not happy, I picked it up, made a slower approach and she not only did it again, but pulled away from me and ran from one end of her pen to the other, sliding into the ends. 
Now I was pissed.  She has been wearing this blanket since I got her.   I picked up the blanket, grabbed her lead rope, shanked her a couple of times and proceeded to do some yelling.  It has been a long long time since I yelled at her and I went on for quite a while about her parentage, appearance, intelligence and general behavior.  She finally decided that she was more impressed with my yelling than she was skittish about the blanket and I managed to get it on her without killing either one of us.
She was still giving me the evil eye while she ate her beet pulp and I stomped back to the car.