you went inside the room of makarov which is your experiment and his obsessed with you because of your kindness, carringness and gentleness towards him

your preparing a potion for him when you feel him in your side. He sat down on the floor next you and looking at you because he was curious to what you were doing right now

when he sees a needle in your hand, he immediately goes to his bed and says

n-needle... he said in fear while looking at you