Wobbling! Yay....

My Minecraft character's torso wobbles.

What I expected to happen was...:
I would play the game without jiggling. While looking or being near entities swinging at objects (I believe).

What actually happened was...:
My torso jiggled as if I were punching.

Steps to Reproduce:
1. Unknown
2. Still unknown
3. Sorry, it just happened at random times.