copper‐golem moonwalked

I hit the copper golem while it's opening a chest.

Originally, the copper golem was supposed to close the chest and be blown away.

However, the copper golem walk like the moonwalk for a few meters while still making the motion of opening the chest. Then, after moving a few meters, it moonwalks again and returns to the chest. And it opened the chest again, it stops behaving strangely and returns to normal.