(In response to very close/loud thunder) "That scared me right out of my underpants!! Only, I'm not wearing underpants, just my fast pants." (Fast pants are his special pj pants which make him very very fast.)
"If you don't do what I say, I will yell! Just like YOU DO"!!! (sigh)
"Now I have 2 invisible friends".
"Mom, you need to take a deep breath".
"Will it be my birthday again soon"?