Making objects jump into the air. Giving them sudden Force?

I have tried this code a few times to get a certain set of objects to jump into the air when i pass through 1 of the triggers and make a sound. A sort of. Jumpscare for my horror game. But it seems that when my player walks through the trigger. Nothing happens. I have avoided the gravity issue by applying the velocity directly and they are not on isKinematic either.

Here's the problem code.

     var destroyTime = 0.1;
     var forcesound : AudioClip;
     var girllaugh : AudioClip;
     var trigger1 : GameObject;
     var trigger2 : GameObject;
     var woodenBoxsGroup : GameObject;
         
         
         function OnTriggerEnter (col:Collider){ 
         rigidbody.velocity += transform.up * 10;
         audio.PlayOneShot(forcesound, 0.9);
         audio.PlayOneShot(girllaugh, 0.9);
         yield WaitForSeconds(destroyTime);
         destroy();
     }
     
     function destroy(){
     Destroy (trigger1);
     Destroy (trigger2);
     
     }