The Royal Atysian Encyclopedia says:
Brainstorming = the activity of repeatedly running up to, fighting and killing, (see also -> "Grinding"), of a certain group of inteligent plants known as -> "Psykoplas". Wich grow in large patches in the ->Verdant Hights and -> Zorai and fortunately respawn a short while after the last plant was destroyed, resulting in quite good Experience points in a relatively short time. The Name of the activity owes to the remarkable resemblance of a fully grown Psykopla to a Homin Brain. (see also -> "Brains on a stick")
CU & Sorry for the Offtopic
(thx to Karishan for the Idea)
Acridiel