Caught in a rock trick : Lineage 2 Submissions

Near the human starting city there is the Obelisk of Victory> A large spire that is surrounded by misc. mobs. If you head about 10 yards northwest of that there is a medium sized rock. If your a archer or mage you can stand perpendicular to the rock(it's kind of a oval shaped) and cast your spell and when the mob gets caught up in the rock you can just keep casting. Although it only works about 1/2 the time, the mob will always be caught up for a atleast 1 or 2 spells which could be the difference between life and death.