here the twins are the equivalent of 12-year old's
#94 I Know You, But Where
Elrohir stirred when he heard the sound of his brother groaning in bed. Three days ago, Elladan and Elrohir had taken a wild horse without asking and gone to ride it out in the wild. However, the horse was not yet broke, and the two hardly made it to the borders when the horse was spooked and reared up on its hind legs tossing Elladan off causing him to hit his head on a rock.
Elrohir tried to wake his brother, but the older twin would not stir. Running to get help his father wasted no time in bringing his unconscious son to the healing rooms. Elrond worked for hours to wake his son and heal any injuries which may have been caused by the accident but unfortunately, Elladan appeared to be in a coma. Elrond told Elrohir all they could do was to sit and wait for him to wake up on his own and hope there was no damage to his brain.
When Elladan awoke, his brother was instantly by his side. "Elladan! You are awake! How do you feel?"
Elladan looked around and seemed to be very confused. "Where am I?" he asked, his voice trembling with fear.
By this time, Elrond and Celebrían were by their son's side trying to calm him. "Shhh, ion-nín, you are safe now. You are home in bed. You had an accident," his mother said caressing his hair.
Elladan's eyes fell on his twin who was feeling a little frightened at his brother's behavior. Elrohir could tell something was not right. "Dan? What is wrong?"
Cocking his head to the side, Elladan stared at Elrohir for the longest while before replying. "I know you, but where?"
Elrohir stood motionless. His brother – his twin – had no memory of him.