The Terminator Decoupling: [s2e17]

In a highlight of the season, Penny loses patience with Sheldon’s complex instructions and simply smashes his puzzle box to get the drive.

Sheldon must guide Penny into his "sanctum sanctorum" (his bedroom) via phone. [S2E17] The Terminator Decoupling

Howard uses the pun "It's hot in here, must be Summer," which backfires so spectacularly that she eventually breaks his phone. In a highlight of the season, Penny loses

After all the effort, Sheldon’s attempt to present the paper to Dr. George Smoot results in Smoot throwing the paper away. In a highlight of the season