(After watching the clips of the home video)
Bart: Ha ha ha ha. They're going to eat this up at show and tell.
Marge: I'm not sure if I'm comfortable with the idea of your classmates laughing at our family's private moments. How would you like it if 20 years from now people were laughing at things you did?
Bart: Not likely. Come on, have a sense of humor about yourself. (Watches the clip of himself on the toilet saying "I'm a big boy today," then Lisa laughs) Uhhhh… I gotta find somethin' else quick.