A good example of why you should wear a helmet?
More like, a good example of why you should not be riding at all.
Sorry to say, I haven't worn a helmet in eight years and have had no incidents, and this doesn't encourage me to wear one yet. HOWEVER, this does encourage me to seek advice from a professional when I have problems with my horse, and to not do cheap tricks for the sake of ego.
I'm sorry, but snow + bareback + poor training = what do you think was going to happen?
Glad she was wearing a helmet. Sad her brain is already damaged.