I've been volunteering at some local stables for about four weeks now. I have learned in principle how to tack up, and have helped, but haven't done a whole tack-up on my own yet.
This morning we were quite busy and short-staffed and the stable manager asked me to get the saddle on Red, a usually sweet-natured mare who HATES being saddled. There is actually a sign saying that only staff are allowed to tack her. I said, "Okay, I'll give it a go..."
Yeah. Red was not having it. She started snapping at me, turning round and round trying to kick me. I tried to stay at her shoulder, turning with her whilst lifting the saddle, but then she'd bite at me and I'd back away out of range, take a breath and try again.
Finally the stable manager came over did it for me. I watched to see what I was missing and it was just a matter of physical courage: staying close to the horse, being forceful, and braving a few bites (they don't have canine teeth after all).
I feel bad for losing my nerve like that. I'm not afraid of horses at all, but this was the first time a horse actually had a go at me and all I wanted to do was back down.
How do you stay on top of a situation like that?