A Pillager without arms

I had seen a video of "How to tame a Pillager" and decided to do it, I opened the Minecraft and put a Pillager and a Villager in a small house that I believe, After several minutes waiting for the Pillager to break his Crossbow finally happened, But not in the way I thought ... Instead of not having his crossbow and it's all right to the Pillager it happened that he lost his arms, I was so impressed that he even took screenshot and a video.