History Recap / TheBigBangTheoryS6E8TheFortyThreePeculiarity

* TheReveal: The audience gets to know what Sheldon wrote 43 for at the very ending. [[spoiler: Sheldon is trying to break his record of how many times he can bounce a ball with his knee, and his record was 43. He keeps his ball bouncing private in that room]].

* TheStinger[=/=]TheReveal: The audience gets to know what Sheldon wrote 43 for at the very ending. [[spoiler: Sheldon is trying to break his record of how many times he can bounce a ball with his knee, and his record was 43. He keeps his ball bouncing private in that room]].

* SpiritualSuccessor: To [[Recap/TheBigBangTheoryS3E7TheGuitaristAmplification "The Guitarist Amplification"]], in which Penny also invited another man into her apartment thus making Leonard raise suspicions.

!!Plot

* SpiritualSuccessor: To "The Guitarist Amplification", in which Penny also invited another man into her apartment thus making Leonard raise suspicions.

* AbsenteeActor: Amy and Bernadette.

* ArtisticLicenseStatistics: Unusual for a series that tries (and generally succeeds) in getting the science and analysis right: Sheldon, while playfully unnerving Leonard by chipping at his vulnerabilities, remarks that as Leonard is of average height, automatically, it implies that half of the people in the country are taller than he. This is not true of the average; to take a small example, in a room with people 5'4", 5'5", 5'8", 5'7", 5'9", 5'9", 6'7", 6'5" and 5'10", ''no one'' would be the average height of 5'9.78", and the 5'10" person, who is ''closest'' to the average height, is taller than most of the people in the room, with two people taller and six people shorter. Sheldon's statement may be true if he were talking about the ''median'' height, (in this case, 5'9", which is the value exactly at the middle of the sample (with an even numbered sample, it would be the average of the two values in the middle). In fact, in this example Sheldon's statement would ''still'' be false, since the median height is shared by two people, with more people shorter than taller.

* ArtisticLicenseStatistics: Unusual for a series that tries (and generally succeeds) in getting the science and analysis right: Sheldon, while playfully unnerving Leonard by chipping at his vulnerabilities, remarks that as Leonard is of average height, automatically, it implies that half of the people in the country are taller than he. This is not true of the average; to take a small example, in a room with people 5'4", 5'5", 5'8", 5'7", 5'9", 5'9", 6'7", 6'5" and 5'10", ''no one'' would be the average height of 5'9.78", and the 5'10" person, who is ''closest'' to the average height, is taller than most of the people in the room, with two people taller and six people shorter. Sheldon's statement may be true if he were talking about the ''median'' height, (in this case, 5'9", which is the value at the middle (with an even numbered sample, it would be the average of the two values in the middle). In fact, in this example Sheldon's statement would ''still'' be false, since the median height is shared by two people, with more people shorter than taller.

* JumpScare: As Howard and Raj freak out over the fake video, Sheldon sneaks up behind them and drops the alien prop in front of them, making them scream extra hard.
* ThePeepingTom: Howard and Raj try to find out what Sheldon writing 43 means in a private room. Sheldon is not pleased that they (attempted to) invade his privacy and punishes them both by inserting false footage of him pretending to be eaten by a squid-like alien from another dimension. And as a bonus, he tosses the squid-alien prop in front of them right as they're watching the footage in horror.

* TheStinger: The audience gets to know what Sheldon wrote 43 for at the very ending. [[spoiler: Sheldon is trying to break his record of how many times he can bounce a ball with his knee, and his record was 43. He keeps his ball bouncing private in that room]].

-->'''Leonard:''' Call me Leonard, Dr. Hofstadter's my father. And my mother. And my sister. And our ''cat''. Although, I'm pretty sure Dr. Boots Hofstadter's degree was honorary.
* YourCheatingHeart: Subverted, Leonard suspects that Penny is cheating on him since she invites her college friend Cole into her apartment for a history project.

* JerkassBall: Penny pulls one by openly telling Leonard she's inviting a friend over (instead of keeping it a secret from him) and then telling him to be cool with it, then lashes out at him and tells him to cool it when he starts complaining about the idea of her spending time with another man. It's as though Leonard's own feelings don't matter at all to Penny, yet she gets angry just because of Leonard being upset about it due to her arrogance that she is morally superior to Leonard.

* YourCheatingHeart: Leonard suspects that Penny is cheating on him since she keeps inviting random men into her apartment. Penny of course doesn't help alleviate his fears by angrily lashing out at him to stop trying to dig into her personal life.

* ThePeepingTom: Howard and Raj try to find out what Sheldon writing 43 means in a private room. Sheldon is not pleased that they (attempted to) invade his privacy and punishes them both by inserting false footage of him pretending to be eaten by a squid-like alien from another dimension.

Raj and Howard try to figure out where Sheldon disappears to every 2:45 PM. Meanwhile, jealous erupts within Leonard and Penny's relationship.

* JerkassBall: Penny pulls one by openly telling Leonard she's inviting a friend over (instead of keeping it a secret from him) and then telling him to be cool with it, then lashes out at him and tells him to cool it when he starts complaining about the idea of her spending time with another man. It's as though Leonard's own feelings don't matter at all to Penny, matter yet she gets angry just because of Leonard being upset about it due to her arrogance that she is morally superior to Leonard.

* JerkassBall: Penny pulls one by openly telling Leonard she's inviting a friend over (instead of keeping it a secret from him) and then telling him to be cool with it, then lashes out at him and tells him to cool it when he starts complaining about the idea of her spending time with another man.

* CallBack: 43 is also the element number of Technetium, which was an answer to a Physics Bowl question back in Season 1's "[[Recap/TheBigBangTheoryS1E13TheBatJarConjecture The Bat Jar Conjecture]]" back when Dr. Gablehauser asked, "What is the lightest element on Earth with no stable isotopes?". Technetium-99m is the most common medical radioisotope used by the world and the United States.

* CallBack: 43 is also the element number of Technetium, which was an answer to a Physics Bowl question back in Season 1's "[[Recap/TheBigBangTheoryS1E13TheBatJarConjecture The Bat Jar Conjecture]]".

* AbsenteeActor: Amy, who was rarely absent since her debut in Season 3's "The Lunar Excitation".

* YourCheatingHeart: Leonard suspects that Penny is cheating on him since she keeps inviting random men into her apartment. Penny of course doesn't help alleviate his fears by angrily lashing out at him to stop

!!Tropes: