Particle effect on collision?

This is a simple question. I did it a couple of times already, don't know why I can't get it done now... I made a particle effect, I want this to get played when the player collides with the platform. Here's what I've done:

 public class StartingPlatformFall : MonoBehaviour
 {
     //public GameObject smoke;
     //public GameObject spawn;
     public ParticleSystem smoke;
 
     private void OnCollisionEnter(Collision collision)
     {
         if (collision.gameObject.tag == "Player")
         {
             //Instantiate(smoke, spawn.transform, Quaternion.identity);
             smoke.Play();
         }
     }
 }

What am I doing wrong?