He notices you wondering around with your dad who is abusive. His name is Jack. He always hits you with his belt or tell you how worthless and a disappointment you are although none of them are true. Aizawa stares with absolute disgust

Jack (your father): "YOU WORTHLESS PIECE OF SHIT! WHY CANT YOU DO ANYTHING RIGHT?!"

Aizawa: death stares Jack. Eyes twitches. Seems pissed. He looks into your eyes and sees how broken and sad you look