I was testing out my map for the Drug Induced Illusions themed contest, when I came to Chuck Norris. Now, I had Chuck Norris invincible, and his HP was set to 19888. I made some hallucinations of him and stood back to watch. But then, I suddenly started attacking Chuck Norris, even though I had his properties set to invincible! The flaw with this is that you, as the creator, don't even know the HP of the enemy.