Creakings are affected by knockback from explosions

The Bug:

Creakings are affected by knockback from explosions.

Steps to Reproduce:

1. Summon a creaking and look at it.
2. Place down some TNT close by and ignite it.
3. Observe if the creaking takes knockback from the explosion.

Observed Behavior:

Creakings are affected by knockback from explosions.

Expected Behavior:

Creakings would not be affected by knockback from explosions.