Armadillos bob/vibrate when moving quickly

The Bug:

Armadillos bob/vibrate when moving quickly.

Steps to Reproduce:

1. Summon an armadillo and punch it.
2. Watch the armadillo's body closely as it panics.

Observed Behavior:

Armadillos bob/vibrate when moving quickly.

Expected Behavior:

Armadillos would not bob/vibrate moving quickly.