This glitch happens in the PC edition 1.8.8. When I attempt to tame a fully grown horse, donkey, or other "horse" entity, my cross-hair, which was previously aimed at the horse, will be thrown over about a fourth of a screen distance away. I used an entire stack of apples on it to make sure it was fully grown, so that wasn't the issue.

Pictures:
1. Before clicking the donkey
2. After clicking

In the pictures, you can see that when I click the donkey, I am spun around 180 degrees. The donkey does not buck or make any noise.