When explaining the characters/real life guys...He said something along the lines of "you take a couple guys who already aren't the brightest individuals, give em steroids & they go crazy"...very paraphrased, I don't remember the a act quote. Then kimmel said "do you really think steroids make you go crazy like that? Cuz ur pretty jacked right now" then wahlberg flexed & said, "all natural here. I went from 165 to 212 by eating 12 meals a day, waking up every couple hrs in the night to eat, and then when wasnt eating was taking 'growth naps'"...aka, the typical celebrity response to that type of question.