Avenger Affix in NMD makes them BIG

So I noticed that when monsters become enraged, they also become physically bigger - I wanted to try and see what the limit is with this so I would just keep one monster super enraged alive and kill all his buddies around him

WOW they can beome GIGANTIC ahahaha it is quite amusing has anyone else noticed or tried this?

Do i need to start the game for this?

I believe someone had a gigantic butcher! that would be scary