// ENEMY STATE (FREEFALL)
public override void Coll_Collision(Collision2D collision) // *OnCollisionEnter2D
 {

     if (collision.gameObject.tag == "HITBOX_WALL")
     {
         wall_hits++;

         Hitbox_Wall wall = enemy.get_hitbox_wall_data();

		// ISSUE BELOW ///

         // When it hits the wall, calculate speed and apply velocity.
         Vector2 impact_velocity = -collision.relativeVelocity; // Get the enemy's impact velocity from the wall
         float impact_speed = impact_velocity.sqrMagnitude;

         Debug.Log(impact_speed);

         // If the speed at which the enemy hits the player is
         if (impact_speed > wall.wall_damagable_speed)
         {
             wall.DealDamage();
         }

         // Apply velocity from the ground
         enemy.get_rigidBody2D().velocity = impact_velocity * wall.elasticity * wall.coldir;

     }
 }