This experiment is flawed from the beginning. Having him not smoke pot for 30 days does abolutely jack shit... the only way I could take this seriously is if you took someone who didn't smoke pot or only did it occasionally (like in Supersize Me; the dude went from being an average 'user' to a daily 'user' for 30 days) and had them smoke it every day for a month.
I'm only at part 5, but as is, all we're seeing is a dude who smokes a shit ton of pot, goes through 30 days of sobriety, and then starts smoking it again. I'm guessing the effects are gonna be the same as if you drank coffee daily, then stopped for 30 days, then started again.