In crowd animation, the Surface Arrive behavior is similar to the Seek behavior: it lets you specify one or morer objects as a stationary or moving target for delegates. The principal difference is that you can use the Approach settings to specify an intermediate target. After reaching this location, the delegates will then make their final approach to the ultimate target surface. An example would be birds flying over a row of telephone poles, and then each one dropping to land on top of a different pole.