TEXT: [ Penny's apartment ] [SCENE_BREAK] Penny: So, tell me about your day, how's it going with the particle detector? Leonard: Wow, you remember that? Penny: Yeah, I listen to what you say. You're building a particle detector using superfluid helium. Leonard: You know, when you talk like that, I want to take you right here on this table. Penny: And you know from past experience this table cannot support both our weight. So, how's the detector going? Leonard: Well, it's tricky working with superfluids. Whatever container you put them in, they kind of creep up the sides and crawl out all on their own. Penny: Kind of like Sheldon's ant farm. Leonard: Exactly, except you don't have a lunatic running around, yelling, I fed you sugar water, why are you biting me? Come on, this is boring, you really want to talk about this? Penny: No, I do. I-I didn't write "superfluid helium" on this napkin for nothing. Leonard: Okay, well, this is cool. Uh, there's a thing called "superfluid vacuum theory", where empty space is imagined as a superfluid with all of its qualities, viscosity, density, surface tension... Penny: Hey, if you're pausing for dramatic effect, I'd keep it moving. Leonard: No, no. People don't talk about surface tension. If you imagine our three-space as the surface of an N-dimensional superfluid bubble... This is exciting. This is really exciting. I have to go find Sheldon. Penny: Okay, well, if you find him, use the kitchen island, that coffee table will not support both of you. [SCENE_BREAK] [ The apartment ] [SCENE_BREAK] Leonard: Which means a spherical multidimensional superfluid shows the same negative-energy density as space-time. So what do you think? What do you think? So what do you think? Sheldon: Hmm. Leonard: What? Is it wrong? Have you seen
SUMMARY:
Leonard has a revelation about Superfluid vacuum and presents his theory to Sheldon who approves. Sheldon writes a paper on their work and they post an online paper together. It is well received except for one troll who makes disparaging comments. Sheldon challenges this person, but panics when he tries to video call him. Leonard and Sheldon decide to stand up for themselves and are stunned when their harasser is revealed as Professor Stephen Hawking who actually liked their paper and had only commented negatively because he was bored. Meanwhile at Penny's apartment the girls spend the night embarrassing each other, first by watching the terrible gorilla movie that was Penny's last acting job, then Penny finds some video footage of a younger Bernadette in a beauty pageant, and finally Bernadette reveals Amy's romantic fan fiction of Little House on the Prairie theme about her and Sheldon: this backfires when they become invested in the story. Leonard also enjoys Penny reading the fanfic to him, but stops before a creepy sex scene.