void ApplyStun(Transform playerHit)
{
Stun playerHitStun = playerHit.GetComponent <Stun> ();
if (playerHitStun != null)
{
playerHitStun.Refresh();
playerHitStun.duration = 2;
}
else
{
Stun stun = playerHit.gameObject.AddComponent <Stun>();
stun.duration = 2;
}
}