Alex: [aside to camera] It was so embarrassing. Professor Stieglitz is a genius. He doesn't fall for people who pretend to understand him by saying things like "Quite, quite," or, "Indeed," or...
[flashback:]
Phil: Touché, my good man! But seriously, I-I have a science question I've always wondered about.
Alex: Uh, maybe keep wondering.
Phil: Would there be a safe amount of helium you could give a baby that would lift it off the ground?
Dr. Stieglitz: What?
Phil: [laughing] Oh. I don't want it to float away. I-I just want it to have fun.