Furious anger is attained when the "angry party" becomes so infuriated it causes all the ions in a porch sized radius to turn negative, preventing all those in range from speaking a known formal language.
Once this point is reached the angry party will likely breath loudly through their teeth and/or nose, periodically letting out an elongated groan resembling one given off during childbirth or during the dropping of a child-size dump.
Victims within the angry party's radius will often cower making high pitched Eeks or ear piercing squeals resembling that of a dying rabbit. Crawling or staggering away the victims will seek refuge outside the angry one's bloodthirsty beaming eyes, knowing, whether responsible for this furious anger or not, if distance is not gained they will be swallowed in a wave of furious anger.
"I set my facebook status to, 'Just got best Beej ever'. Her friends saw and furious anger ensued."