The Big Bang Theory Season 2 Episode 18 : The Work Song Nanocluster
Penny develops home-made hair barrettes, called 'Penny Blossoms', which she expects to turn into a profitable homebased business. Sheldon soon points out the flaws in her production process, and helps her develop a better assembly line. Leonard, Howard, and Raj also contribute their own ideas for efficiency, production and marketing. Leonard designs the sales website, and right away they get an order for a thousand Penny Blossoms from the East Rutherford, New Jersey Gay-Lesbian-Bisexual-Transgender Alliance. Despite their initial happiness, they realize Leonard included a one-day rush shipping option in the website, so the quintet has to work all night to fulfill the order. However, the next morning, they discover that the same group doubled their order, leading everyone to quit in exhaustion.