- The girls head to Las Vegas, while the guys try to invent something cool, but only come up with new ways to procrastinate.
- Leonard, Sheldon, Howard and Raj all come to the conclusion that they have been so distracted ever since the arrival of the girls in their lives that they have not been able to focus their minds on the matter of just brainstorming on issues scientific. So they decide to have a boys weekend in to do that brainstorming. They encounter many problems along the way, the two biggest being what to focus their scientific priorities on, and how to stay focused on the task at hand and not get sidetracked by other distractions. While the boys are in, Penny, Amy and Bernadette decide to have a girls weekend away in Las Vegas. Once they arrive in Vegas, a situation with Penny leads to a role reversal where Penny ends up being the studious one, and Amy and Bernadette end up being the drunken party girls.—Huggo
- At the Caltech cafeteria, Raj describes a new invention that converts one's walking footsteps to electromagnetic energy so that a cell phone could be charged while walking. Leonard remembers that they had that idea years ago, but didn't pursue it. Every one of the guys has been distracted by their girls for years. Sheldon even admits that Amy is a distraction. The guys decide to have a weekend of brainstorming new ideas. Sheldon doesn't want to go to a cabin in the woods, a hotel, a lake house or a beach house due to scary movies he has seen.
Leonard asks Penny if it's all right for him to blow off their Sunday brunch so the guys can spend a science retreat weekend. Without answering Leonard, Penny asks the girls if they want to spend the weekend in Vegas. Bernie and Amy get excited and start checking hotels, airplane flights and underwear (Amy)
As the guys are setting up snacks and things, Raj joins them. Now with the girls gone and there are no distractions, they have 48 hours to come up with ways to change the world. Raj since they are innovating, he feels like he is in that Facebook movie with Justin Timberlake. Sheldon has it so they decide to make popcorn and watch it. They start going through and old list of invention ideas that mainly involve robot girlfriends and other sex toys which are pages of them. They decide to come up with a new idea. Many inventions have come out of science fiction books and movies according to Sheldon. Arthur C. Clark described geosynchronous satellites, the Motorola flip-phone was just like the Star Trek communicator and Sheldon feels that the idea of a colored president came from the movie "Deep Impact". The movie "Back To The Future part 2" took place in 2015, the next year, so they decided to work on one of the futuristic inventions from that film like hover-boards. After starting to discuss how to invent one, they end up watching the movie.
In Vegas, the girls are all dressed up ready to go out. Amy wants to go see the lounge band that plays Barry Manilow music. Penny wants to down a bucket of margaritas, throw up all over the roulette wheel and watch it fly everywhere. Penny then gets a text from her boss that they moved her field ride up to Monday and that she now only has two days to prepare for it. She tells Bernadette and Amy to go on out and that she'll catch up with them later while she tries to get a start on her background material.
Back in Apartment 4A, the guys are watching BTTFP2 together. Howard pauses the movie because he doesn't understand the changes in the film's time-line. If Biff Tannen delivers the sports almanac to his younger self, how can he return to the future where Marty McFly and Emmett "Doc" Brown already are? He should return to the alternate future that was affected by the changes that his younger self made. Sheldon keeps arguing about the tenses of events that take place on alternate time-lines. Leonard reminds them that they sent the girls away so they could focus. Sheldon adds that it didn't seem to work.
Amy and Bernie are drinking two very large margaritas. Bernadette is proud that Penny is taking her job so seriously. No matter how good looking Penny is, Amy thinks that both of them are rocking, especially Bernadette. Amy wants to know how large her breasts are. Amy is embarrassing Bernadette.
The guys have moved onto Leonard's lab to work with fewer distractions. Leonard and Howard discuss how they could use Maglev technology to make the hover-board work. They also consider using super-cooling materials and quantum coupling techniques and go online to check it out. Instead they find a map of Austria and decide that it does look like a wiener. Sheldon suggests that they use some conditioning techniques to punish them and keep them focused. Similar work was used to get pigeons to learn to play ping-pong. Next they are seen watching pigeons play ping-pong. Leonard then stops them and suggests they need a punishment technique. Howard suggests snapping a rubber band on their wrist when they stray. Sheldon mentions torture devices and then goes on Amazon to find one.
Penny is back in their hotel room busy on her laptop, when Amy and Bernadette come stumbling through the door after pretending to be from housekeeping. Penny is glad they are having fun. Bernadette over tipped her waitress when she realizes she is missing her $100 gambling chip. Amy wants them to go to a club with Australian male strippers. Bernadette wants to know if they twirl their junk in the opposite direction. Amy calls the over-studying Penny a nerd and wants her to come with them. Amy offers to help Penny by quizzing her and then steals her laptop telling her that it'll be at the strip club. Bernadette wonders why she is not chasing Amy. Amy ran into the walk-in closet.
The guys decide to torture each other by putting duct tape on their arms and tearing off arm hair when anyone gets off-topic. They believe that their discussing about the duct tape is off topic and they start torturing each other. Leonard then concludes that negative reinforcement is not going to help them. Sheldon corrects him that it's positive punishment. Bill Murray made the same mistake at the beginning of the "Ghostbusters" movie. They pull up the clip and Sheldon is right. Howard wants to watch the scene with the Stay-Puft Marshmallow Man. Leonard again tries to get them to again think about work. Why should they stand around his lab watching "Ghostbusters" on some crappy laptop? Sheldon agrees that they shouldn't, so they go back to the apartment to watch the whole movie. Who ya going to call? GHOSTBUSTERS!!
Among the loud music at the strip joint, Bernadette is slipping a bill into a dancer's G-string while Penny is still studying. Bernadette asks if Amy has ever seen a body like that. Amy has seen a lot of good ones in her anatomy class, but none of them move like these guys. Penny keeps on studying.
Finally, the next morning Penny is relaxed and heading to the pool, while Bernie and Amy are hung-over. She reminds them that only nerds and losers stay in the room. She opens the drapes to show them how bright it is and then decides not to close them. Bernadette groans and asks Amy to close the drapes. She agrees, rolls off the bed and ends up passing out on the floor.
Title reference: The weakening of the men's focus on their work due to their other halves.
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