Penny Hofstadter: [Sheldon holds up another card] Oh, that's a venn diagram. And I remember because I thought to myself: 'Venn is he going to stop talking about this diagram?'
Leonard Hofstadter: What are you guys doing?
Sheldon Cooper: Oh, well, we decided to use our breakfast time to expand our respective knowledge bases.
Leonard Hofstadter: Hnh. Let me try.
Leonard Hofstadter: Atom of hydrogen; Adam of Maroon 5; mike drop.
Sheldon Cooper: I'm sorry, who is Mike Drop?