duck

var ball : GameObject;

function Start()
{
    ball.rigidbody.velocity.y = -5;
}

function OnCollisionEnter (other : Collision)
{
        if (other.gameObject == ball) {
                other.rigidbody.AddForce(Vector3.up * 0);
                other.rigidbody.velocity.y = 15;
        }
}