Meanyeons are highly volatile, and can be as explosive as caesium in water. They are known to completely annihilate weaker beings if provoked. While Meanyeons mostly travel alone due to their intense lack of social skills, you may come across a herd of them on occasion. This will likely occur in the DMZ between North and South Korea, where intensely modified creatures from the Communist north roam free.
If you are unlucky enough to encounter such a herd, you have a 0.0074% chance of survival. It is likely that you will also find among the herd a creature known as a JHPA. The full, expanded acronym is an unutterable series of words. Comparable to "YHWH," the sacred name of God. The pronunciation of this word has long been lost. If the full name of JHPA is ever again to emerge from the mouth of a human being, the world will plunge into a MAD (Mutual Assured Destruction) nuclear war.
A noted and well-documented method of avoiding Meanyeon attacks is to stroke the wrist of the creature itself. This deactivates the attack mechanism of the Meanyeon by causing it to hyperventilate and laugh hysterically, at which point it is advisable to strangle the little bugger.