Triggering an animation once ?

Questions & Answers
1

I have a door that can be opened, and I have an animation that I want it to be played when I open the door and only happen once (like a jumpscare). I tried to use an empty object with box collider as a trigger but when the player walk into it, the animation played although I didn’t open the door. Here is the script I used to create door open/close in case I need to modify it:
#pragma strict

private var guiShow : boolean = false;

var isOpen : boolean = false;

var door : GameObject;

var rayLength = 10;

var customSkin : GUISkin;

var DoorOpenSound : AudioClip;

var DoorCloseSound : AudioClip;

function Update()
{
	var hit : RaycastHit;
	var fwd = transform.TransformDirection(Vector3.forward);
	
	if(Physics.Raycast(transform.position, fwd, hit, rayLength))
	{
		if(hit.collider.gameObject.tag == "Door")
		{
			guiShow = true;
			if(Input.GetKeyDown("e") && isOpen == false)
			{
				door.animation.Play("OpenDoor");
				isOpen = true;
				guiShow = false;
				audio.PlayOneShot(DoorOpenSound);
			}
			
			else if(Input.GetKeyDown("e") && isOpen == true)
			{
				door.animation.Play("CloseDoor");
				isOpen = false;
				guiShow = false;
				audio.PlayOneShot(DoorCloseSound);
				
			}
		}
	}
	
	else
	{
		guiShow = false;
	}
}

function OnGUI()
{
	if(guiShow == true && isOpen == false)
	{
	    GUI.skin = customSkin;
		GUI.Box(Rect(Screen.width / 2, Screen.height / 2, 100, 25), "E open");
	}
	if(guiShow == true && isOpen == true)
	{
	    GUI.skin = customSkin;
		GUI.Box(Rect(Screen.width / 2, Screen.height / 2, 100, 25), "E close");
	}
}
2

Destroy or disable the collider after using the door