Adult Sheldon: My mother eventually coaxed me back into a car with a trip to RadioShack. She knew I was nervous so she came up with an interesting distraction.
Mary: Baby, how about we play a car game?
Sheldon: I suppose. Can I make it science-based?
Mary: Sure.
Sheldon: I'll say an element starting with "A," then you repeat that and add one starting with "B."
Mary: I don't think I'll get very far.
Sheldon: Great. Then I'll win. Aluminum.
Mary: Okay, uh, you said "A" for aluminum. "B." Is boron an element?
Sheldon: Yes.
Adult Sheldon: It was the beginning of a new tradition. One that would eventually bring countless hours of joy to Leonard on our drives to work. Much like my mother, he never beat me.
Mary: I don't know an element that starts with "D."
Sheldon: I win. That was fun. Round two. Argon.

Mary: Too bad. We are going.
Sheldon: Class is starting tomorrow. I'm not going anywhere.
Mary: Sheldon, do not argue with me. You are going home.
Sheldon: Mom, the people of Germany are obsessed with rules and devoid of humor. I am home.

Principal Petersen: Our next young speaker needs no introduction, but that didn't stop him from writing one and making me read it. [laughter] "Fun fact." [audience groans, murmurs] I hear you. "The word 'valedictorian' is from the Latin 'valedicere,' meaning 'to say farewell.' It is primarily used in the United States, Canada, the Philippines and Armenia." Maybe that fact's more fun in Armenia. Please welcome your valedictorian, Sheldon Cooper.
Mary: Yay, Shelly!
Sheldon: Hello. I'm not very comfortable speaking in front of crowds. But there's a technique to reduce stage fright by focusing on one person in the audience and delivering your speech just to them. That's what I'll be doing today. If it weren't for this person, I wouldn't be here right now. They've taught me a lot, and it's by their example that I found the courage to move forward into this new and exciting chapter of my life. Missy... ...this is for you. Change can be scary, but I know we're going to be fine... ...because like you said, "It's okay to be scared. We just have to do it anyway." So if any of my fellow graduates are nervous about the future, know that you're not alone. I suggest you all try to be as brave as my twin sister. That's my plan. Missy, I wish I could give you advice about middle school, but I was so smart, I skipped it. If you make it to high school, we'll talk. Thank you. [applause]

Mary: You understand that some people are going to be intimidated by you, because of how smart you are?
Sheldon: Or maybe they'll recognize my intellect and make me their leader.

Dr. John Sturgis: [on the phone] So, there's no one who can lend you a car?
Meemaw: There is the church shuttle, but that just feels like it's the end of the line.
Dr. John Sturgis: Oh, I wouldn't say that. There's all sorts of depressing steps before the end. You've got full-time nursing care.
Meemaw: Bye, John.
Dr. John Sturgis: Assisted living.
Meemaw: Bye, John.
Dr. John Sturgis: Hospice.
Meemaw: Bye, John.
Dr. John Sturgis: Life support.
Meemaw: Bye, John!
Dr. John Sturgis: Pulling the plug. [chuckles]
Meemaw: Bye, John.
Dr. John Sturgis: Then... you make a miraculous recovery!
Meemaw: Great!
Dr. John Sturgis: But... the hospital bills leave you destitute!
Meemaw: Bye.
Dr. John Sturgis: Bye.

Dr. John Sturgis: [on the phone] Oh, my goodness. Was anyone hurt?
Meemaw: No. But now I got no car for a while.
Dr. John Sturgis: You could ride your bike.
Meemaw: An old lady on a bike? That's not cool.
Dr. John Sturgis: Really? Then I won't ask how I look on one.
Meemaw: You look great.
Dr. John Sturgis: I know. I just wanted to hear you say it. [Meemaw chuckles]

Adult Sheldon: People often ask why I was so resistant to getting a driver's license. My spotty history with motor vehicles was certainly a factor.
[flashback: Georgie driving Sheldon and Missy to the hospital:]
Sheldon: Please slow down.
Georgie: I'm going eight miles an hour. A cow just passed us.
Missy: You're gonna hit it!
[flashback: George driving through a car wash with Sheldon:]
Sheldon: Make it stop!
George: It's just a car wash.
Sheldon: Do something!
George: It's just a car wash.
Sheldon: We're gonna die!
George: Just a car wash.
[flashback to Sheldon on a go kart:]
Sheldon: Why did I agree to this? I don't care for this at all.