Brian placed the plastic cup back onto the tray before answering in a whisper , " You had an incident at school . " Justin opened his eyes again and tried to remember why he was at the school . The pillowcase was hurting the back of his head and he reached back to see what the problem was . It was then that he felt the bandage on his head and Brian gently pulled his hand away as he explained , " You had to get some stitches back there . 
Question: What probably happened before this story ?
Justin was injured at school