Equipping a saddle on a Horse causes you to go upside down.

When looking down as you equip a saddle on any horse/mule, your view flips upside down while in the horse's inventory.

What I expected to happen was...:
The saddle to be equipped and for the screen to, well, not flip.

What actually happened was...:
The screen flipped upside down as I equipped the saddle to the horse while riding it.

Steps to Reproduce:
1. Get on tamed horse with no saddle.
2. Look down as far as possible
3. Equip the saddle