One of my favourite TBBT episodes is 3.23 "The Lunar Excitation", when Sheldon meets Amy for the first time in the coffee shop. What if the initial "Shamy" meeting had gone differently? Everything belongs to Lorre and Prady.
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A dirty sock had caused Sheldon to reluctantly accompany Howard and Raj to the coffee shop to meet with Amy.
"May I buy you a beverage?"
"No thank you, this charade has gone on long enough to satisfy my mother. I am leaving now, good day to you Dr. Cooper."
As Amy prepared to leave suddenly, in a rather high-pitched voice, Raj said
"Please don't go Amy, I think you are beautiful….."