Crashed when I got on a horse

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
I thought I was to get on a horse and ride it.

What actually happened was...:
Describe what happened here
It crashed and I was logged out

Steps to Reproduce:
1. Give horse 64 apples.
2. Get on horse
3. CRASH