Update:New Event - Tangle Vine

This official news post is copyrighted by Jagex. It is a direct quote from the RuneScape website.
This update was added on 6 April 2004.

Some of you are already coming across a new random event in RuneScape, the Tangle Vine!
If you find yourself in the midst of one of these strange plants, which can quickly grow across the floor, then do not panic. The vines will only harm you if they sense you moving, stay still and they will disappear after about 30 seconds with no harm done. The Tangle Vine is a very greedy plant, and it will attack both players and monsters in it's search for food.