关于站在移动物上的问题

using UnityEngine;
using System.Collections;

public class PhysicsTest : MonoBehaviour
{
    const int MAX_MASS = 10000;

    void Awake()
    {
        GetComponent<Rigidbody>().mass = MAX_MASS;
        GetComponent<Collider>().material = new PhysicMaterial();
        GetComponent<Collider>().material.staticFriction = 99999;
        GetComponent<Collider>().material.dynamicFriction = 99999;
    }

    IEnumerator Start()
    {
        while (true)
        {
            for (int i = 0; i < 100; i++)
            {
                GetComponent<Rigidbody>().velocity = Vector3.right * Time.deltaTime * 1000f;
                yield return new WaitForFixedUpdate();
            }

            yield return new WaitForSeconds(1);

            for (int i = 0; i < 100; i++)
            {
                GetComponent<Rigidbody>().velocity = -Vector3.right * Time.deltaTime * 1000f;
                yield return new WaitForFixedUpdate();
            }

            yield return new WaitForSeconds(1);
        }
    }
}