In the opening scene, the guys demonstrate a complicated way to turn on a lamp using a laptop signal sent around the world via the internet, simply "because we can".
Leonard decides to present without Sheldon. During the lecture, Sheldon appears in the audience and heckles him, eventually trying (and failing) to "explode" Leonard's brain with his mind. The confrontation turns into a physical, slapstick fight in front of their peers. [S1E9] The Cooper-Hofstadter Polarization
Howard posts a photo of Penny asleep on his shoulder and claims she is his girlfriend; Penny reacts by mimicking Sheldon’s "head-exploding" gesture at Howard. In the opening scene, the guys demonstrate a
For more details, you can find the full script on the Big Bang Theory Transcripts site or check reviews on IMDb . The Cooper-Hofstadter Polarization - IMDb The confrontation turns into a physical, slapstick fight