The book is so good. The doc didn't spend nearly enough time on his childhood and there you really get to understand he was an entertainer through and through.
The story that stuck with me the most is he was at Catholic summer camp (age 13ish) in worship, and the they separated the girls on one side and the guys on other...he's going up to take the sacrament at the front...pauses to get the girls' attention, smiles at them, takes a few more steps looking in their direction and then totally trips and eats **** spitting white tic tacs everywhere and screaming "OH DEAR LORD MY TEETH!"