"Listen, I don't know why you do it, but if you keep ramming your head into the wall like that, you can hurt your brain quite badly." "Hah, what do you know, s

"Listen, I don't know why you do it, but if you keep ramming your head into the wall like that, you can hurt your brain quite badly." "Hah, what do you know, scientist? You already admitted you don't know how the brain works!" "Oh, you're damn right, what was I thinking? Please carry on."