Steps to Reproduce:

1. Enter a creative singleplayer world
2. Summon an armadillo with the /summon command or with its spawn egg
3. Cause the armadillo to curl up by sprinting next to it
4. Wait for the armadillo to stick its head out and then sprint immediately again

Observed Results: The new armadillo unrolling animation can cut abruptly when something scares the armadillo while its unrolling animation is playing. This causes the armadillo's sticking out body parts to disappear while it is "checking if the coast is clear".

Expected Results: The animation of armadillo curling up should smoothly transition from the animation of the mob unrolling.