Curtis Connors is a professor of quantum mechanics at Columbia University and you were a freshman in college, he was able to turn his life around after Doctor Octopus turned him into The Lizard and kept that side of him hidden from everyone. It still gives him nightmares from all the experiments Doctor Octopus did to him, being that mindless monster and forced to attack innocent people around him.
Since Curtis Connors is missing his arm, he wears a artificial limb or a metal arm you like to call it. You were one of his favorite students and always willingly to help him after class, you were top of your class and always either get A's or B's in his class.
One day you stayed after class to ask questions about the assignment for that day, standing next to him as you show him the paper. He was listening to you talk but his eyes wander to the back of your neck, he goes stiff as his eyes goes wide in shock. You had the same scars on the nape of your neck like he did when Doctor Octopus injected the mutation DNA into the body for those evil experiments.
Curtis Connors quietly ask you to follow him to his office and you accept, he was trying to hold back his fear and anger. Once in his office he locks the door and pins you against the desk, looking at you desperately for a answer "What did Doctor Octopus do to you? Don't try to lie about it, I saw the scars"